Pakistan Air Force PAF Aero Trade and Commission Mock Test • Solved Examination Paper

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JobJunction.pk Official Examination Series 2026

Pakistan Air Force PAF Aero Trade and Commission Mock Test

Testing Authority: Direct PAF Selection • Recruitment Examination Paper
Candidate Name: _________________________________
Roll Number: _______________
Max Marks: 475 Marks
INSTRUCTIONS: Total Time Allowed: 30 Minutes. Each question carries 1 mark. Fill exactly one circle corresponding to your selected answer on the answer sheet. No mobile phones or electronic gadgets are permitted in the examination hall.
Q1. Which mountain pass connects Pakistan with China through the Karakoram Highway?
(A) Khyber Pass
(B) Bolan Pass
(C) Khunjerab Pass
(D) Tochi Pass
Q2. Sound waves require a material medium and cannot propagate through which of the following?
(A) Water
(B) Steel
(C) Vacuum
(D) Hydrogen gas
Q3. Fill in the blank with the appropriate preposition: 'He is senior ___ me in rank and service.'
(A) than
(B) to
(C) from
(D) with
Q4. What is the Least Common Multiple LCM of the numbers 12 and 18?
(A) 24
(B) 36
(C) 48
(D) 72
Q5. Newton first law of motion is fundamentally known as the Principle or Law of:
(A) Momentum
(B) Inertia
(C) Action and Reaction
(D) Gravitation
Q6. What is the standard International System SI unit of electric current?
(A) Volt
(B) Ohm
(C) Ampere
(D) Watt
Q7. Pakistan successfully conducted its nuclear tests in the Ras Koh Hills of Chagai on which historic date?
(A) 23 March 1998
(B) 28 May 1998
(C) 14 August 1998
(D) 6 September 1998
Q8. What is the standard value of acceleration due to gravity g on the surface of the Earth?
(A) 8.9 m/s²
(B) 9.8 m/s²
(C) 10.8 m/s²
(D) 12.0 m/s²
Q9. Which optical device or lens is used to correct Myopia (nearsightedness) in human vision?
(A) Convex lens
(B) Concave lens
(C) Bifocal lens
(D) Cylindrical lens
Q10. The only elemental metal that is liquid at room temperature is?
(A) Lead
(B) Zinc
(C) Mercury
(D) Aluminum
Q11. She is afraid ?the dog/darkness.
(A) Off
(B) Of
(C) To
(D) From
Q12. How many hours are there in a week?
(A) 124
(B) 148
(C) 168
(D) 180
Q13. What is the formula of power?
(A) P=W×t
(B) P=W/t
(C) P=W+t
(D) P= t/W
Q14. Lenz' Law can explain ?
(A) Only two of the three types of magnetism
(B) Ferromagnetism only
(C) Diamagnetism only
(D) None of these
Q15. In a transverse wave, the distance between two successive/adjacent crests or troughs of a wave is called ?
(A) Frequency
(B) Amplitude
(C) Velocity
(D) Wavelength
Q16. The median of 3,1,8,6,9 is ?
(A) 2
(B) 4
(C) 6
(D) None of these
Q17. The Synonym of Munificent is?
(A) Puny
(B) Generous
(C) Philanthropic
(D) Both B and C
Q18. The SI unit of Electrical Resistance is ?
(A) Volts V
(B) Ohms Ω
(C) Amps A
(D) Watts W
Q19. In the sentence "He runs fast", The word Fast is a?
(A) Noun
(B) Verb
(C) Adverb
(D) Adjective
Q20. A device that converts mechanical energy into electric energy is called ?
(A) Motor
(B) Transformer
(C) Coil
(D) Generator
Q21. The Antonym of Stale is?
(A) Sour
(B) Dry
(C) Fresh
(D) Flag
Q22. The current through a conductor between two points is directly proportional to the voltage across the two points, is known as?
(A) Ohm’s law
(B) Kirchhoff’s 2nd law
(C) Kirchhoff’s 1st law
(D) None of these
Q23. AND, OR, XOR, NOT, NAND, NOR are which type of gate?
(A) Automatic gate
(B) Logic gate
(C) Program gate
(D) None of these
Q24. The equation E = mc² indicates that energy ?
(A) Is fundamentally different than mass
(B) And mass are closely related
(C) Equals mass moving at the speed of the light square
(D) None of these
Q25. Geostationary satellites appear to be stationary when viewed from the Earth. Geostationary satellites are located directly above the ?
(A) Tropic of Cancer
(B) Prime Meridian
(C) Equator
(D) None of these
Q26. What is the sum of all angles in a triangle?
(A) 10°
(B) 20°
(C) 180°
(D) 220°
Q27. Who explained the Photoelectric Effect?
(A) Isaac Newton
(B) James Clerk Maxwell
(C) Albert Einstein
(D) Niels Bohr
Q28. Which is the highest peak of Himalayas range in Pakistan?
(A) K-2
(B) Nanga Parbat
(C) Sakasar
(D) Tirichmir
Q29. Admin is capable ?doing anything.
(A) Off
(B) With
(C) Of
(D) From
Q30. Who was the founder of Daily English Newspaper Dawn?
(A) Quaid-e-Azam
(B) Sikandar Mirza
(C) Liaquat Ali Khan
(D) Allama Iqbal
Q31. The Synonym of Lethargy is?
(A) Serenity
(B) Laxity
(C) Active
(D) Bold
Q32. Change into Indirect: He said, "Honesty is the best policy.“?
(A) He said that Honesty is the best policy
(B) He said that Honesty was the best policy
(C) He said that Honesty would be the best policy
(D) None of the above
Q33. She always helps ?poor.
(A) The
(B) An
(C) A
(D) None of these
Q34. 1024 kilobytes is equal to ?
(A) 1 terabyte
(B) 1 gigabyte
(C) 1 megabyte
(D) Both A and B
Q35. Swim is to Fish as Walk is to?
(A) Chair
(B) Bird
(C) Man
(D) None of these
Q36. Chose the antonyms of PIQUE?
(A) Value
(B) Guilty
(C) Smooth
(D) Soothe
Q37. The law of inertia also called ?
(A) First Law of Motion
(B) Second Law of Motion
(C) Third Law of Motion
(D) None of these
Q38. The particles of a liquid?
(A) Are tightly packed and stay in a fixed position
(B) Are free to move in a container but remain in close contact with one another
(C) Are widely spaced and move freely in any direction
(D) Are sparse and vibrate at long distances
Q39. For rectification, we use ?as a rectifier .
(A) Capacitor
(B) Inductor
(C) Diode
(D) Resistor
Q40. If FATHER → 431789, then HERE → ?
(A) 85185
(B) 7898
(C) 8518
(D) 431789
Q41. Dr. Abdul Salam won the Nobel Prize for the subject of ?
(A) Biology
(B) Chemistry
(C) Mathematics
(D) Physics
Q42. Convex lenses are also known as ?
(A) Converging lenses
(B) Diverging lenses
(C) Deflecting lenses
(D) Reflecting lenses
Q43. The Antonym of Ductile is?
(A) Docile
(B) Pliable
(C) Devious
(D) Rigid
Q44. Primary colors of white light are?
(A) White Black Blue
(B) Red Green Blue
(C) Yellow Black Blue
(D) None of these
Q45. Kyoto is located in which country?
(A) China
(B) South Korea
(C) Japan
(D) Thailand
Q46. Senate of Pakistan consists of how many members?
(A) 100
(B) 96
(C) 104
(D) None of these
Q47. The Antonym of Gumption Imagination is?
(A) Nerve
(B) Initiative
(C) Apathy Lethargy
(D) Despair
Q48. The Synonym of Embezzle is?
(A) Remunerate
(B) Clear
(C) Balance
(D) Misappropriate
Q49. P-type material consists of ?
(A) Intrinsic 3D crystals of silicon
(B) Intrinsic 4D crystals of silicon
(C) Intrinsic 2D crystals of silicon
(D) None of these
Q50. The 70% of 50 is ?
(A) 35
(B) 30
(C) 25
(D) 20
Q51. Why mercury is used as a thermometric fuild?
(A) High M. P
(B) High B.P
(C) Stable coefficient of expansion
(D) All of these
Q52. What is the dimensional formula of force?
(A) M T² L⁻¹
(B) M L T⁻²
(C) L M⁻¹ T²
(D) M L² T⁻¹
Q53. 90 % of 90 = ?
(A) 90
(B) 84
(C) 81
(D) 90
Q54. A wave transfers?
(A) Energy
(B) Frequency
(C) Wavelength
(D) Velocity
Q55. Knife is to Cut as Pen is to ?
(A) Dig
(B) Cook
(C) Build
(D) Write
Q56. The RMS value of an AC waveform is?
(A) Maximum at 0° and minimum at 90°
(B) Maximum at 45° and minimum at 0°
(C) Maximum at 90° and minimum at 0°
(D) Same at all angles
Q57. 70% of 70 =?
(A) 47
(B) 48
(C) 49
(D) 50
Q58. The most commonly used material in semiconductor devices is?
(A) Germanium
(B) Graphite
(C) Gallium nitride
(D) Silicon
Q59. Total percentage of silicon in earth crust ?
(A) 27.72%
(B) 30%
(C) 45%
(D) None of these
Q60. Force per unit area is called ?
(A) Volume
(B) Density
(C) Velocity
(D) Pressure
Q61. A sad poem usually written to praise and express sorrow for someone who is dead is known as ?
(A) Oad
(B) Elegy
(C) Sestina
(D) Epic
Q62. Sound Waves travel faster in a medium ?
(A) Denser
(B) Rigid
(C) Solid
(D) Soft
Q63. The chemical name of quartz is:?
(A) Silicon dioxide
(B) Stannous oxide
(C) Aluminum oxide
(D) None of these
Q64. One Mega-Byte is equal to:?
(A) 1024 Bytes
(B) 1024 Giga Bits
(C) 1024 Kilo Bytes
(D) 1024 Bits
Q65. To every action there is always an equal and opposite reaction. This is the statement of ?
(A) Newton first law of motion
(B) Newtons second law of motion
(C) Newton’s Third Law of Motion
(D) None of these
Q66. The SI unit of electric power is?
(A) Watt
(B) Joules
(C) Volts
(D) Ampere
Q67. In a p-type material/semi conductor the ?is the majority carrier.
(A) Proton
(B) Electron
(C) Atoms
(D) Holes
Q68. Steel is more elastic than Rubber because ?
(A) Its density is high
(B) Ratio of stress to strain is more
(C) Ratio of stress to strain is less
(D) It is a metal
Q69. If the price of an item is increased by 20% and the new price is $60, what was the original price?
(A) $40
(B) $50
(C) $45
(D) $55
Q70. The Antonym of ARROGANT is?
(A) Humble
(B) Meek
(C) Proud
(D) Both A and B
Q71. He is wealthy but he ?helps the poor.
(A) Rarely
(B) Easily
(C) Actually
(D) None of these
Q72. Which one among the following is a hydrocarbon compound? Candle wax, Polyurethane, Glycerol, Aspirin?
(A) Candle wax
(B) Polyurethane
(C) Glycerol
(D) Aspirin
Q73. A person who helps another to do a crime a?
(A) Accomplice
(B) Amateur
(C) Cuckold
(D) Changeling
Q74. Which uranium atoms undergo fission readily?
(A) U²³⁶
(B) U²³⁸
(C) U²³⁵
(D) None of these
Q75. Choose the correct spelling: Dipendant, Dependant, Dependent, Dependunt?
(A) Dipendant
(B) Dependant
(C) Dependent
(D) Both B and C
Q76. What do you understand by 'omniscient'?
(A) One who is present everywhere
(B) One who is merciful
(C) One who is powerful
(D) One who has all knowledge
Q77. 1KWh = ?J?
(A) 3.6 MJ
(B) 3.6 GJ
(C) 3.63J
(D) 3.6KJ
Q78. Choose the correct spelling word: Embrass, Embarrass, Emberass, None of these?
(A) Embrass
(B) Embarrass
(C) Emberass
(D) None of these
Q79. A person who talks in his | her sleep is known as ?
(A) Bourgeois
(B) Insomnist
(C) Ventriloquist
(D) Somniloquist
Q80. A long poem narrating achievements of a hero or legendary figures is known as ?
(A) Ode
(B) Epic
(C) Elegy
(D) Sestina
Q81. The Synonym of Bewildered is?
(A) Frustrated
(B) Mixed
(C) Astonished
(D) Confused
Q82. What is the capital of Saudi Arabia?
(A) Riyadh
(B) Jaddah
(C) Makkah
(D) Tabook
Q83. Shirt is to dress as mango is to ?
(A) Fruit
(B) Vegetable
(C) Food
(D) None of these
Q84. The Antonym of Artificial is?
(A) Red
(B) Solid
(C) Natural
(D) Truth
Q85. The book is?the mug and pen.
(A) In
(B) Among
(C) Between
(D) Of
Q86. Mother was aware ?her children.
(A) From
(B) With
(C) Of
(D) On
Q87. Galvanometer was made on the rules of ?
(A) Electromagnetism
(B) Electricity
(C) Magnetism
(D) None of these
Q88. The Antonym of Abridge is?
(A) Easy
(B) Shorten
(C) Extend
(D) None of these
Q89. First Law of motion gives the definition of ?
(A) Rest
(B) Motion
(C) Velocity
(D) Inertia
Q90. "Boat is to water" therefore "Plane is to?"?
(A) Road
(B) Forest
(C) Air
(D) Fly
Q91. Which of the following is the lightest metal? Mercury Lithium Lead Silver?
(A) Mercury
(B) Lithium
(C) Lead
(D) Silver
Q92. The least count of Vernier caliper is ?
(A) 0.1cm
(B) 0.2mm
(C) 0.01mm
(D) None of these
Q93. A set of metabolism reaction which maintain internal environment is ?
(A) Positive feedback
(B) Negative feedback
(C) Osmoregulation
(D) Homeostasis
Q94. In which object, form sharp and dark shadows?
(A) Transparent
(B) Translucent
(C) Opaque
(D) None of these
Q95. Which City of Pakistan is famous for sports goods?
(A) Peshawar
(B) Lahore
(C) Sialkot
(D) Islamabad
Q96. Brass is an alloy of ?
(A) Zinc and copper
(B) Zinc and iron
(C) Copper and gold
(D) Zinc and gold
Q97. Which is the Currency of Indonesia?
(A) Dinar
(B) Rupiah
(C) Ringgit
(D) Dollar
Q98. Synonym of Dense is?
(A) Thick
(B) Light
(C) Sparse
(D) Thin
Q99. With the increase in temperature, heat will be?
(A) Increase
(B) Decrease
(C) Remain constant
(D) None
Q100. A capacitor is a device used to store ?
(A) Electricity
(B) Magnet
(C) Electric charge
(D) None of these
Q101. When the velocity of object becomes doubled then its kinetic energy becomes?
(A) One time
(B) Fourth time
(C) Half
(D) Two time
Q102. The unit of frequency is ?
(A) Hertz
(B) Metre
(C) Meter Per Second
(D) None of these
Q103. She is interested ?drawing and painting.
(A) Into
(B) Of
(C) With
(D) In
Q104. Boot is to foot as glove is to ?
(A) Wool
(B) Cloth
(C) Cotton
(D) Hand
Q105. ATP is best defined as ?
(A) The molecule that releases energy when the phosphate molecule is removed
(B) The molecule that has no role in muscle contraction
(C) The molecule that releases energy when phosphate molecule is added
(D) None of these
Q106. What is the energy stored in a capacitor if capacitance is 4 μF and voltage is 100 V?
(A) 0.04 J
(B) 0.02 J
(C) 0.2 J
(D) 0.01 J
Q107. Newton's first law of motion is also called as?
(A) Law of conservation of energy.
(B) Law of momentum.
(C) Law of inertia.
(D) Law of force.
Q108. Enzymes are made of ?
(A) Carbon
(B) Protein
(C) Silica
(D) Oil
Q109. When resistances are connected in series, the current passing through them is ?
(A) Zero
(B) Different
(C) Same
(D) None of these
Q110. What is the standard form of a quadratic equation?
(A) ax^2 + bx + c = 0
(B) ax^2 + b = c
(C) a x - h ^2 + k = 0
(D) a x - p x - q = 0
Q111. If the 1st day of the month is a Monday, what is the date of the 3rd Friday of the month?
(A) 17
(B) 21
(C) 19
(D) 20
Q112. Charles's Law involves the relationship between?
(A) P, T
(B) V, T
(C) P, V
(D) P, n
Q113. What is the mathematical statement of the first law of thermodynamics?
(A) ΔE = q + W
(B) ΔE = -q -W
(C) ΔE = -q - W
(D) ΔE= q -W
Q114. The dimension formula of angular momentum is?
(A) M L T⁻²
(B) M L² T⁻¹
(C) M L² T⁻²
(D) M L T⁻¹
Q115. The angular acceleration is produced by ?
(A) Momentum
(B) Pressure
(C) Torque
(D) Power
Q116. The focal length of thin convex lens is ?
(A) Greater than that of thick convex lens
(B) Smaller than that of thick convex lens
(C) Equal than that of thick convex lens
(D) None of these
Q117. The SI unit of power is ?
(A) Force
(B) Charge
(C) Current
(D) Watt
Q118. What are the primary colours?
(A) Blue, green, yellow
(B) Yellow, Red, Blue
(C) Red, blue, green
(D) Red, blue, orange
Q119. Which of the following has a coordinate bond?
(A) NH₃BF₃
(B) H₂O
(C) CaO
(D) NaCl
Q120. Jerusalem is the Holy City of ?
(A) Christians
(B) Jews
(C) Muslims
(D) All of them
Q121. The instrument used to measure blood pressure is?
(A) E.C.G
(B) Tethoscope
(C) Sphygmomanometer
(D) None of these
Q122. Complete the series 2, 4, 6, 10, 28, ?
(A) 88
(B) 82
(C) 78
(D) None of these
Q123. The shortest distance between two points is called?
(A) Distance
(B) Speed
(C) Displacement
(D) Velocity
Q124. A plane mirror forms an image that is ?
(A) Real and Inverted
(B) Virtual and Inverted
(C) Real and Upright
(D) Virtual and Upright
Q125. Power is the dot product of?
(A) Force and acceleration
(B) Force and displacement
(C) Force and velocity
(D) Mass and velocity
Q126. What number in the series 34, 24, 16, 10, 6 ?
(A) 2
(B) 4
(C) 3
(D) 7
Q127. Muslim League was founded in which year?
(A) 1905
(B) 1906
(C) 1913
(D) 1947
Q128. Choose the correct substitute word/sentence: A game which no one is win?
(A) Draw
(B) Loss
(C) Toss
(D) None of these
Q129. The turning effect of force is called ?
(A) Moment
(B) Momentum
(C) Torque
(D) None of these
Q130. Which one of the following units represents the largest amount of energy?
(A) Joule
(B) Calorie
(C) Electron Volt
(D) None of these
Q131. Buffer is a solution which?
(A) Has constant pH
(B) Resist change in its pH
(C) Consists of a strong acid and a strong base
(D) Contains salts of strong acids and strong bases
Q132. Where is the French Beach located?
(A) Karachi
(B) Paris
(C) Jiwani
(D) Gwadar
Q133. When sound waves move from one medium to another the quantity which remains the same is?
(A) Wavelength
(B) Frequency
(C) Speed
(D) Intensity
Q134. A mass accelerates uniformly when the resultant force acting on it ?
(A) Is zero
(B) Is constant but not zero
(C) Increases uniformly with respect to time
(D) Is proportional to the displacement of mass from a fixed point
Q135. The value of Boltzmann's constant is ?
(A) 1.38 × 10²³ J/K
(B) 1.38 × 10−²³ J/K
(C) 1.38 × 10²³ K/J
(D) None of these
Q136. Limestone is not a ?
(A) Sedimentary Rock
(B) Stratified Rock
(C) Aqueous Rock
(D) Metamorphic Rock
Q137. The rate of flow of charge at certain point is called ?
(A) Voltage
(B) Electric Current
(C) Resistance
(D) Power
Q138. Law states that at constant temperature for a fixed mass, the absolute pressure and the volume of a gas are inversely proportional.
(A) Boyle’s Law
(B) Pascal’s law
(C) Charles’ law
(D) None of these
Q139. Magnetic lines of force always form ?
(A) Hyperbola
(B) Parabola
(C) Closed loop
(D) None of these
Q140. The ratio of output to input is called?
(A) Energy
(B) Work
(C) Power
(D) Efficiency
Q141. The value of 'g' at the equator is ?
(A) Smaller than at poles
(B) Larger than at poles
(C) Same as at poles
(D) None of the above
Q142. The time period of a simple pendulum is independent of its ?
(A) Mass
(B) Value of G
(C) Length
(D) None of these
Q143. Mercury flows on a surface due to?
(A) Low cohesion
(B) High adhesion
(C) High cohesion
(D) None of these
Q144. When a forward bias is applied to a p-n junction, the concentration of electrons on the p side?
(A) Increases slightly
(B) Increases dramatically
(C) Decreases slightly
(D) Decreases dramatically
Q145. Ground water is called :?
(A) Water under the Surface of Earth
(B) Water above the Surface of Earth
(C) Both A and B
(D) None of these
Q146. Turbulent flow occurs when the Reynolds number is above ?
(A) 5000
(B) 1000
(C) 800
(D) 4000
Q147. Freezing point of mercury is?
(A) -39C
(B) -99C
(C) -30C
(D) None of these
Q148. Planet Mercury completes one rotation around the sun in how many days?
(A) 87
(B) 89
(C) 86
(D) 88
Q149. The melting point of mercury is ?
(A) -39°C
(B) 0°C
(C) -100°C
(D) None of these
Q150. In which year Pakistan won the T-20 World Cup?
(A) 2009
(B) 2010
(C) 2007
(D) none of these
Q151. An example of ionic compound is ?
(A) H
(B) CH
(C) N
(D) NaCl
Q152. What is the cross product of vectors 1, 0 and 0, -1 ?
(A) 1
(B) -1
(C) 0
(D) 2
Q153. If an object is dropped from a height, its initial velocity will be?
(A) Zero
(B) 9.8 m/s
(C) 1 m/s
(D) Cannot be determined
Q154. The maximum height in projectile motion is achieved at which angle?
(A) 45 degrees
(B) 60 degrees
(C) 90 degrees
(D) None of these
Q155. People are finding friends ?the internet.
(A) In
(B) At
(C) On
(D) With
Q156. ?gives good advice.
(A) Idiom
(B) Word
(C) Sentence
(D) None of these
Q157. The boss sits ?the chair.
(A) In
(B) At
(C) On
(D) Over
Q158. MI-5 is the intelligence agency of which country?
(A) United State
(B) United Kingdom
(C) Israel
(D) France
Q159. A student consistently reports 0.2 ml less than the actual value. This is an example of?
(A) Random error
(B) Blunder
(C) Systematic error
(D) Calculation mistake
Q160. The pH of 0.01 M HCl is?
(A) 1
(B) 2
(C) 0.1
(D) 10
Q161. Number of molecules in 0.5 moles of CO₂ is?
(A) 6.022 × 10²³
(B) 3.011 × 10²³
(C) 1.5 × 10²³
(D) 0.5 × 10²²
Q162. A device used to measure potential difference is called ?
(A) Galvanometer
(B) Ammeter
(C) Voltmeter
(D) None of these
Q163. Which day is known as leap day or leap year day?
(A) Feb-29
(B) Feb-28
(C) Feb-30
(D) Feb-31
Q164. The value of the eccentricity of a circle is?
(A) 0
(B) 1
(C) Less than 1
(D) Greater than 1
Q165. The ?has the greatest intermolecular forces?
(A) Solid
(B) Gas
(C) Liquid
(D) Plasma
Q166. How many types of concave lens are there?
(A) One
(B) Two
(C) Three
(D) Four
Q167. The lever kind of human arm is?
(A) First class
(B) Second class
(C) Third class
(D) None of these
Q168. In the central nervous system, myelinated axons form the ?matter.
(A) Black
(B) White
(C) Grey
(D) Brown
Q169. The study of the nervous system and it's disorder is called ?
(A) Herpetology
(B) Neurology
(C) Urology
(D) Hematology
Q170. The function of oesophagus in digestive system is to ?
(A) Absorb nutrients from food
(B) Mix food with digestive enzymes
(C) Pass the food to the Stomach
(D) Store food temporarily
Q171. All of the following are parts of the digestive system except?
(A) Stomach
(B) Heart
(C) Small intestine
(D) Large intestine
Q172. Small food molecules after digestion pass from digestive system to blood by which one of the following process?
(A) Egestion
(B) Absorption
(C) Assimilation
(D) None of these
Q173. Digestive system in animals start from?
(A) Ectoderm
(B) Mesoderm
(C) Endoderm
(D) Periderm
Q174. Antonym of Composed is?
(A) Nervous
(B) Horrible
(C) Separate
(D) Calm
Q175. Brevity is the ?of wit.
(A) Heart
(B) Mind
(C) Soul
(D) Base
Q176. If 20 students of class 10 speak Urdu, 33 speak Sindhi only and 13 can speak both, how many students can speak only Sindhi?
(A) 75
(B) 33
(C) 13
(D) 6
Q177. The Jar was full ?oil.
(A) From
(B) Off
(C) With
(D) Of
Q178. Which country left the Kyoto Protocol?
(A) Canada
(B) USA
(C) Spain
(D) None
Q179. In a reversible process, the entropy of the system:?
(A) Remains constant
(B) Increases
(C) Decreases
(D) Zero
Q180. The entropy of steam is ?than ice.
(A) Similar
(B) Smaller
(C) Greater
(D) None of these
Q181. In which of the system listed below is the entropy decreasing?
(A) A gas is cooled
(B) A plate is shattered
(C) An egg is scrambled
(D) A drop of dye diffuses in a cup of water
Q182. 1.5% of 100 is?
(A) 0.15
(B) 1.5
(C) 15
(D) 10
Q183. MIT is located in which country?
(A) Canada
(B) United Kingdom
(C) Australia
(D) United States
Q184. When an acid reacts with an alkali, the reaction is called?
(A) Displacement reaction
(B) Combustion reaction
(C) Neutralization reaction
(D) Precipitation reaction
Q185. Tannic acid is commonly found in?
(A) Milk
(B) Plant materials
(C) Lemon
(D) Vinegar
Q186. Catalyst used to convert SO₂ to SO₃ is?
(A) Copper
(B) Iron
(C) Vanadium Pentoxide V₂O₅
(D) Nickel
Q187. If pH = 3, the solution is?
(A) Strong base
(B) Neutral
(C) Weak acid
(D) Strong acid
Q188. Enzymes are special types of ?produced by the body.
(A) Vitamin
(B) Mineral
(C) Proteins
(D) None of these
Q189. Enzymes are ?
(A) Steroid in nature
(B) Protein in nature
(C) Lipid in nature
(D) Carbohydrate in nature
Q190. The teacher is ?the chair.
(A) At
(B) On
(C) Over
(D) In
Q191. There is a cat ?your chair?
(A) Under
(B) Into
(C) In
(D) None of these
Q192. All the bones of the body make the framework called?
(A) Skeleton
(B) Muscular system
(C) Nervous system
(D) Circulatory system
Q193. The Whatson- Crack Model suggested that DNA replication is?
(A) Conservative
(B) Duplicated
(C) Sami-Conservative
(D) None
Q194. Identify the picture see in detail given below: Nephron, Neuron, Muscle cell, None of these?
(A) Nephron
(B) Neuron
(C) Muscle cell
(D) None of these
Q195. The peripheral nervous system consists of ?pairs of cranial nerves, which emerge from the brain and mainly serve the head and neck.
(A) 12
(B) 27
(C) 31
(D) 19
Q196. The Central Nervous System CNS is composed of ?
(A) Brain, Spinal Cord
(B) Cerebrum, Thalamus and Hypothalamus
(C) Cerebrum, Pons and Medulla oblongata
(D) Cerebellum, Brain and Nerves
Q197. Octopuses have not only large brains ?also a well-developed nervous system.
(A) And also
(B) But also
(C) Are also
(D) Have also
Q198. She ?both German and Italian.
(A) Speak
(B) Spoke
(C) Speaks
(D) Speaking
Q199. In a storm, two trees ?down.
(A) Was blown
(B) Are blown
(C) Were blown
(D) Blown
Q200. ?I was watching TV, I went to bed.
(A) Before
(B) While
(C) After
(D) Since
Q201. Tourists came ?boat.
(A) By
(B) In
(C) On
(D) With
Q202. A car covers 2 km using 15 liters of fuel. Fuel costs Rs. 90 per liter. How much distance can the car cover for Rs. 450?
(A) 1 km
(B) 2 km
(C) 10 km
(D) 655 km
Q203. He acts ?an undertaker.
(A) Like
(B) For
(C) As
(D) By
Q204. Alas! He is ?
(A) Unhappy, death, upset
(B) Upset
(C) Happy
(D) Glad
Q205. Farmers use a tractor ?in the field.
(A) Plough
(B) To plough
(C) For plough
(D) Ploughing
Q206. What comes next in the series? 100, 98, 94, 88, 80, 70, ?
(A) 58
(B) 62
(C) 66
(D) 64
Q207. The process of maintaining internal body temperature regardless of external environment is called?
(A) Homeostasis
(B) Thermoregulation
(C) Respiration
(D) Metabolism
Q208. Gloves: Hands?
(A) Neck:Collar
(B) Tie:Shirt
(C) Socks:Feet
(D) Coat:Pocket
Q209. HAND : GLOVES :: ?
(A) Legs : shoes
(B) Short : long
(C) Slim : fat
(D) None of these
Q210. My cousin is ?doctor.While my brother is ?author.
(A) a/an
(B) the/an
(C) a/a
(D) None
Q211. Mechanical waves are?
(A) Transverse
(B) Longitudinal
(C) Transverse and Longitudinal
(D) Electromagnetic
Q212. If a cork is thrown in vibrating water, it will?
(A) Move forward with the wave
(B) Sink to the bottom
(C) Stay in place and move up and down
(D) Break into pieces
Q213. Bloons flies in air, its reason is ?
(A) high density
(B) low density
(C) zero density
(D) none of these
Q214. Photosynthesis occurs during day time because it depends on?
(A) Day activities
(B) Sunlight
(C) Brightness
(D) None
Q215. Photosynthesis occurs in ?
(A) Nucleus
(B) Golgi body
(C) Chloroplast
(D) None of these
Q216. How many primary colors are there ?
(A) 2
(B) 3
(C) 8
(D) 4
Q217. Enzymes show optimum activity between 37 C to 50 C however works:?
(A) above 50 C
(B) Below #7 C
(C) It loses activity permanently above 50 C
(D) it loses activity permanently below 37 C
Q218. A restoring force in oscillatory motion always?
(A) Acts away from the mean position
(B) Acts toward the mean position
(C) Remains constant
(D) Increases the speed indefinitely
Q219. The SI unit of potential difference is?
(A) Ampere
(B) Joule
(C) Watt
(D) Volt
Q220. A hydraulic press works on the principle of?
(A) Newton's First Law
(B) Archimedes' Principle
(C) Pascal's Law
(D) Boyle's Law
Q221. Sound waves require a ?for their propagation?
(A) Vacuum
(B) Magnetic field
(C) Medium
(D) High temperature
Q222. If the focal length f of a spherical mirror is negative, the mirror is?
(A) Concave mirror
(B) Convex mirror
(C) Plane mirror
(D) Cylindrical mirror
Q223. Which of the following always forms a virtual, erect, and diminished image due to its negative focal length?
(A) Concave mirror
(B) Plane mirror
(C) Convex mirror
(D) Parabolic mirror
Q224. The image formed by a plane mirror is ?in size to the object.
(A) Smaller
(B) Larger
(C) Different
(D) Same
Q225. A process in which liquid changes into gas without boiling is called?
(A) Condensation
(B) Melting
(C) Freezing
(D) Evaporation
Q226. Liquids have?
(A) No volume
(B) Definite shape and volume
(C) Definite volume, no definite shape
(D) No shape and no volume
Q227. Sound waves in the air?
(A) Transverse waves
(B) Electromagnetic waves
(C) Longitudinal waves
(D) Surface waves
Q228. If input of a NOT gate is "1" then its output is ?
(A) 1
(B) 0
(C) May be 1 or may be 0
(D) None of these
Q229. Which of the following performs its function by converting electrical energy into motion?
(A) An electric motor
(B) An electric bulb
(C) An electric iron
(D) None of these
Q230. The principle of an electric generator is based on ?
(A) Faraday's law
(B) Boyle's law
(C) Newton's law
(D) None of these
Q231. The working principle of a Transformer is?
(A) Electrostatic induction
(B) Electric charge
(C) Neutralization
(D) Electromagnetic conductor
Q232. The conversion of electrical energy into chemical energy is observed in?
(A) Fan
(B) Storage battery
(C) Heater
(D) Incandescent bulb
Q233. In Ampere's law, the integration is over a ?
(A) Surface
(B) Closed path
(C) Closed surface
(D) None of these
Q234. Oxygen is prepared in laboratory from KClO₃ in the presence of ?
(A) Fe2O3
(B) Ni
(C) MnO2
(D) None of these
Q235. What happens to the phase of a wave when it travels from a denser medium to a rarer medium?
(A) Phase changes by 90°
(B) Phase changes by 180°
(C) No phase change
(D) Wave gets absorbed
Q236. If the angle between the vector area and the electric field is 30∘, then the flux will be maximum when?
(A) √3/2
(B) 1/2
(C) 1/√2
(D) √2/2
Q237. The value of maximum electric flux is obtained when angle between E and A is ?
(A) 0°
(B) 90°
(C) 180°
(D) None of these
Q238. The distance between the optical center and the principal focus is called ?
(A) Focal Length
(B) Focal Point
(C) Optical Centre
(D) Centre of Curvature
Q239. Concave lenses are also known as ?
(A) Converging Lens
(B) Diverging Lens
(C) Cylindrical lens
(D) None
Q240. The initial setting time of Hydraulic Lime is?
(A) 30 minutes
(B) 60 minutes
(C) 90 minutes
(D) 120 minutes
Q241. Which one of the following is an insulator for electricity but a conductor for heat?
(A) Iron
(B) Diamond
(C) Graphite
(D) None of these
Q242. Which hydraulic structure is designed to raise or lower boats between water levels in a canal or river?
(A) Lock
(B) Weir
(C) Dam
(D) Spillway
Q243. Which of the following gives correct equation for Hooke's law for the spring? F is force, k is spring constant and x is extension/compression in spring ?
(A) F=k-x
(B) F=kx
(C) F=k+x
(D) Fs = -kx
Q244. Brain Drains means ?
(A) Mad Person
(B) Migration Of Skilled Person To Other Country
(C) Emigration Of Intellectuals
(D) None
Q245. To break the ice means what?
(A) To start quarreling
(B) To end the hostility
(C) To start a conversation
(D) To end up partnership
Q246. In which form of energy is the measure to determine how much energy an object has and in turn how much work can it perform?
(A) Kinetic Energy
(B) Thermal Energy
(C) Potential Energy
(D) Chemical Energy
Q247. Work done is equal to ?
(A) Effort - distance
(B) Effort ÷ distance
(C) Effort x distance
(D) Effort + distance
Q248. In the technical terms, muscle pull is known as ?
(A) Sprain
(B) Strain
(C) Abrasion
(D) Confusion
Q249. What is the value of sin θ × cos 90° ?
(A) 1
(B) 0
(C) sin θ
(D) Undefined
Q250. If the circumference of a circle is 154, its radius is approximately ?
(A) 21 cm
(B) 24.5 cm
(C) 28 cm
(D) 14 cm
Q251. If one angle of an isosceles triangle is 68", then possible values of the second angle are?
(A) Any value between 68° and 180
(B) Any value between 1
(C) Any value between 68° and 112°
(D) 44° or 56°
Q252. The theorem "In a right-angle triangle, the area of the square of the hypotenuse is equal to the sum of the areas of the squares of the other two sides", was discovered by:?
(A) Archimedes
(B) Pythagoras
(C) Isaac Newton
(D) Socrates
Q253. Antonym of import is ?
(A) Export
(B) Deliver
(C) Receive
(D) Bring in
Q254. Synonym of import is?
(A) Export
(B) Deliver
(C) Bring in
(D) Send out
Q255. Karachi is a ?populated city.
(A) Hardly
(B) Thickly
(C) Thinly
(D) Rarely
Q256. Japan is a ?country.
(A) Rich
(B) Richly
(C) Richest
(D) Riches
Q257. Usman is afraid ?dog.
(A) With
(B) From
(C) Of
(D) On
Q258. My sister is bad ?maths.
(A) In
(B) With
(C) At
(D) None of these
Q259. I have had problems similar ?yours.
(A) Too
(B) Of
(C) In
(D) To
Q260. The shopkeeper has charged me ten rupees ?this book.
(A) From
(B) For
(C) Of
(D) With
Q261. Nelson Mandela was deprived ?his freedom.
(A) Off
(B) From
(C) With
(D) Of
Q262. He is accustomed ?hot weather.
(A) With
(B) To
(C) Too
(D) In
Q263. If the focal length f of a mirror is positive, the mirror is?
(A) Convex
(B) Plane
(C) Concave
(D) Cylindrical
Q264. In mirrors, if image distance q is negative, the image will be?
(A) Real
(B) Inverted
(C) Virtual
(D) Reduced
Q265. In mirrors, if image distance q is positive, the image will be:?
(A) Virtual
(B) Real
(C) Magnified
(D) Erect
Q266. What is the principal focus of a mirror or lens?
(A) The center of the mirror or lens
(B) The point where the object is placed
(C) The point where parallel rays meet or appear to meet after reflection/refraction
(D) The edge of the mirror or lens
Q267. He gave me a cheque ?fifty thousand rupees.
(A) For
(B) Of
(C) On
(D) To
Q268. I saw ?one rupee note on the road.
(A) A
(B) An
(C) The
(D) No Article required
Q269. Volt is equal to ?
(A) Watt/C
(B) C/L
(C) J/C
(D) None of these
Q270. 01 V is equal to?
(A) 1 J C^-1
(B) 2 J C^-1
(C) 1 J^-1 C
(D) 2 J^-1 C
Q271. Unit of angular acceleration is?
(A) rad/s²
(B) rad/s
(C) m/s²
(D) N·m
Q272. A NAND gate is a combination of an?
(A) AND gate and NOT gate
(B) OR gate and NOT gate
(C) AND gate and OR gate
(D) OR gate and XOR gate
Q273. The operation used in rectification is?
(A) Differentiate
(B) Integration
(C) Clipping
(D) Conversion of AC to DC
Q274. ixi=jxj=kxk=?
(A) -1
(B) 0
(C) 1.2
(D) None of these
Q275. When weight of an object when its mass is 20kg ?
(A) 190 N
(B) 196 N
(C) 200 N
(D) 220 N
Q276. The drag force on a small spherical body moving through a viscous fluid is given by?
(A) F = 6πηrv
(B) F = 3πηrv²
(C) F = 6πηr²v
(D) F = 3πηr²v²
Q277. Choose the correct spelling: Glamrous, Glamorous, Glamoros, None of these?
(A) Glamrous
(B) Glamorous
(C) Glamoros
(D) None of these
Q278. Correct spelling: Assessment, Assesment, Assiment, Assement?
(A) Assessment
(B) Assesment
(C) Assiment
(D) Assement
Q279. Choose the correct spelling. Anotate, Annotate, Ennotate, Annotet?
(A) Anotate
(B) Annotate
(C) Ennotate
(D) Annotet
Q280. I put ?my shoes.
(A) In
(B) On
(C) AT
(D) Over
Q281. Voice Change: The birds are kept by her. Active Voice ?
(A) The keeps the birds.
(B) She kept the birds.
(C) She is keeping the birds.
(D) She kept a bird.
Q282. He gave me ?one rupee note.
(A) A
(B) An
(C) The
(D) On
Q283. What is the dimensional formula of frequency?
(A) T
(B) T⁻¹
(C) M L T⁻¹
(D) L T⁻²
Q284. Which logic gate has only one gate?
(A) AND gate
(B) OR gate
(C) NOT gate
(D) NAND gate
Q285. Choose an option that is correct according to the standard use of English: He gave me all the maps free?
(A) He gave me all the maps free
(B) He gave me all the maps to free
(C) He gave me all the maps freely
(D) He gave me all the maps in free.
Q286. Change the voice: He gave me a flower yesterday.
(A) I was given a flower by him yesterday
(B) I am given a flower by him yesterday
(C) I could given a flower by him yesterday
(D) I will be given a flower by him yesterday
Q287. What is the Synonym of IMPART?
(A) To inflict
(B) Take sides
(C) Communicate
(D) Defy
Q288. Choose the correct spelling. Precedesce, Precedence, Precedense, All are wrong?
(A) Precedesce
(B) Precedence
(C) Precedense
(D) All are wrong
Q289. I need to ?my shoes before going outside.
(A) Tie
(B) Put on
(C) Lace up
(D) All of these
Q290. Antonym of dense is?
(A) Thick
(B) Thin
(C) Normal
(D) Heavy
Q291. The Antonym of Condense is?
(A) Shorten
(B) Compress
(C) Expand
(D) None of these
Q292. Choose the correct spelling word? Heighte, Height, Haght, Hieght?
(A) Heighte
(B) Height
(C) Haght
(D) Hieght
Q293. Choose the correct spelling word? Magnifecent, Magnificent, Magnefisent, Magneficent?
(A) Magnifecent
(B) Magnificent
(C) Magnefisent
(D) Magneficent
Q294. Choose the correct spelling? Entegrity, Intigrety, Entigrety, Integrity?
(A) Entegrity
(B) Intigrety
(C) Entigrety
(D) Integrity
Q295. Choose the correct spelling? Cammander, Commander, Commender, Comander?
(A) Cammander
(B) Commander
(C) Commender
(D) Comander
Q296. Choose the correct spelling. Comissioner, Commissioner?
(A) Comissioner
(B) Commissioner
(C) Comissioner
(D) Kommissioner
Q297. Mass is a ?
(A) Scalar quantity
(B) Vector quantity
(C) Relative quantity
(D) Dependent quantity
Q298. In Einstein's mass-energy equation 'e' is the:?
(A) speed of sound
(B) speed of electron
(C) speed of earth
(D) speed of light
Q299. In a sample of a substance, at any given temperature the energy of all particles will?
(A) Not be same
(B) Be same
(C) Equal
(D) Constant
Q300. Photoelectic effect shown by ?
(A) Sound waves
(B) X-rays
(C) Light electromagnetic radiation
(D) Radio waves
Q301. The substances which can be strongly magnetized are called ?
(A) Ferromagnetic
(B) Ante-ferromagnetic
(C) Paramagnetic
(D) None of these
Q302. Synonym of the Wild?
(A) Tame
(B) Savage
(C) Gentle
(D) Domestic
Q303. The formula for gravitational acceleration at height h above the Earth's surface is?
(A) gₕ = g × R + h ² / R²
(B) gₕ = g × R / R + h ²
(C) gₕ = g × R - h ² / R²
(D) gₕ = g × R / h ²
Q304. Torque is defined as?
(A) Product of force and velocity
(B) Product of mass and acceleration
(C) Product of force and perpendicular distance from axis of rotation
(D) Product of power and time
Q305. Choose the passive voice of: 'The teacher teaches English.
(A) English is taught by the teacher.
(B) English has been taught by the teacher.
(C) English taught by the teacher.
(D) English is being taught by the teacher.
Q306. The equation of a straight line with slope m and y-intercept c is?
(A) y = mx + c
(B) y = c - mx
(C) x = my + c
(D) y = x/m + c
Q307. A projectile is thrown with velocity 30m/s at an angle of 45. Find its range.
(A) 60 m
(B) 75 m
(C) 92 m
(D) 120 m
Q308. Geostationary satellites revolves around the Earth in?
(A) 12 hr
(B) 24 hr
(C) 48 hr
(D) 6 hr
Q309. Which experiment demonstrated the dual nature of light?
(A) Rutherford's experiment
(B) Photoelectric effect
(C) Milikan's effect
(D) Michelson-Morley
Q310. When light enter from vacuum to water which of the following quantity will not change?
(A) Speed
(B) Wavelength
(C) Frequency
(D) Direction
Q311. Transverse nature of light was confirmed by the phenomenon of the ?
(A) Polarization of light
(B) Diffraction of light
(C) Dispersion of light
(D) None of these
Q312. Detect the grammatical error in the following sentence: Twenty five kilometers/ from Hala to Hyderabad/are/a/long distance?
(A) No error
(B) From Hala to Hyderabad
(C) Are
(D) A long distance
Q313. LASER beam can be sharply focused because it is?
(A) Highly coherent
(B) Plane polarized
(C) Intense
(D) Highly directional
Q314. Which device is used as a particle accelerator?
(A) Compound microscope
(B) Cyclotron
(C) Electroscope
(D) None of these
Q315. Which of the following quantities is conserved in Pair production?
(A) Energy
(B) Momentum
(C) Electric Charge
(D) All of them
Q316. What is ΔH equal to according to the first law of thermodynamics?
(A) ΔE - PΔV
(B) ΔE + P ΔV
(C) -ΔE + P ΔV
(D) -ΔE - P ΔV
Q317. The dimensions of Planck's constant are the similar to?
(A) Power
(B) Angular momentum
(C) Intensity
(D) Momentum
Q318. The rate of change of angular momentum is called?
(A) Torque
(B) Force
(C) Work
(D) Angular velocity
Q319. Identify the verb type in the sentence? He killed a snake?
(A) Intransitive verb
(B) Transitive verb
(C) Auxilliary verb
(D) Linking verb
Q320. Change the voice: Which teacher teaches you English?
(A) By which teacher are you taught English?
(B) By which teacher were you taught English?
(C) By which teacher will you taught English?
(D) By which teacher should you taught English?
Q321. Which sentence is correctly punctuated? She said I am tired.
(A) She said I am, tired.
(B) She, said I am tired.
(C) She said I am tired.
(D) She said, I am tired.
Q322. Correct the sentence: She told that she is tired.
(A) She told me that she is tired.
(B) She told me she is tired.
(C) She told that she was tired.
(D) She told me that she was tired.
Q323. Change the narration: She said, "I am feeling tired now.
(A) She said that she had felt tired now.
(B) She said that she would feel tired then.
(C) She said that she was feeling tired then.
(D) None of these
Q324. The value of log₁₀ 1000 ?
(A) 2
(B) 3
(C) 5
(D) 6
Q325. log 10 is equal to?
(A) 1
(B) 2
(C) 3
(D) 4
Q326. Log₁₀ √10 = ?
(A) 1/2
(B) -2
(C) -1/2
(D) None of these
Q327. The speed of sound in vacuum is?
(A) 0 m/s
(B) 343 m/s
(C) 1,480 m/s
(D) 3.00 x 10^8 m/s
Q328. Synonym of WIELD ?
(A) Abstain
(B) Avoid
(C) Forgo
(D) Exert
Q329. The dimensional formula of angular velocity is?
(A) LT ⁻¹
(B) LT ⁻²
(C) T ⁻¹
(D) L T
Q330. According to Bernoulli’s principle, when the speed of a fluid increases, the pressure?
(A) Increase
(B) Decrease
(C) Remain constant
(D) Double
Q331. The derivative of sin x with respect to x is?
(A) cos x
(B) - cos x
(C) - sin x
(D) 1
Q332. He runs ?fast?
(A) Very
(B) Much
(C) More
(D) Many
Q333. A diode is made of?
(A) Pure metal
(B) Doped semiconductor
(C) Superconductor
(D) Alloy
Q334. Which impurity is added to form an N-type semiconductor?
(A) Trivalent
(B) Pentavalent
(C) Divalent
(D) None of these
Q335. The root mean square value of the alternating current is equal to?
(A) Maximum at 0° and minimum at 90°
(B) Constant for all angles
(C) Maximum at 90° and minimum at 0°
(D) Zero at all angles
Q336. 14 dozen eggs cost Rs.100. If another 48 eggs are bought at Rs.12 per dozen, what is the total cost?
(A) Rs.112
(B) Rs.136
(C) Rs.148
(D) Rs.156
Q337. If an electron has zero orbital angular momentum, the magnitude of its magnetic dipole moment equals:?
(A) Bohr magneton
(B) Half the Bohr magneton
(C) Twice a Bohr magneton
(D) 0
Q338. If momentum of a car is increased by 20% then its K.E is increased by ?
(A) 44%
(B) 34%
(C) 24%
(D) None of these
Q339. The momentum of an object at a given instant is independent of its ?
(A) Acceleration
(B) Speed
(C) Mass
(D) None of these
Q340. Change in Momentum in one second is called ?
(A) Energy
(B) Work
(C) Force
(D) None of these
Q341. Formula of Momentum = ?× velocity.
(A) Volume
(B) Mass
(C) Time
(D) None of these
Q342. If the net force on a body is zero, then the body will be?
(A) At rest or move with constant velocity
(B) Accelerated
(C) Rotating
(D) Falling freely
Q343. The condition Book on table is an example of?
(A) Newton’s 1st Law
(B) Newton’s 2nd Law
(C) Newton’s 3rd Law
(D) Newton’s 4th Law
Q344. A body continues it's state of rest or uniform motion unless acted upon by an unbalanced force. This is the ?
(A) First law of motion
(B) Second law of motion
(C) Third law of motion
(D) None of these
Q345. A body is in equilibrium when it has ?
(A) Uniform speed
(B) Uniform acceleration
(C) Both a and b
(D) Zero acceleration
Q346. What is the next number in the sequence? 23, 5, 63, 9, 73, ?
(A) 13
(B) 12
(C) 15
(D) 7
Q347. Pick the odd one out :Yellow , Red ,Green , Blue?
(A) Green
(B) Blue
(C) Yellow
(D) Red
Q348. ?winters are generally very cold here.
(A) A
(B) An
(C) The
(D) None of the above
Q349. The value of gravitational acceleration g on Mars is approximately?
(A) 3.7 m/s²
(B) 9.8 m/s²
(C) 1.6 m/s²
(D) 24.5 m/s²
Q350. Hot is To Burn and Cold is To?
(A) Stream
(B) Oven
(C) Freez
(D) None
Q351. 10, 20, 40, 80, ?
(A) 160
(B) 120
(C) 180
(D) 140
Q352. My wife and me have two sons. Each son has one sister. How many members are there in my family?
(A) Four
(B) Five
(C) Six
(D) Seven
Q353. Pointing to Anwar's photograph, Abdul said, "He is the son of the only daughter of the father of my brother." What relationship does Abdul have with Anwar?
(A) Maternal Uncle
(B) Cousin
(C) Brother
(D) None of these
Q354. X does not have any sons or brothers but Y’s father is X’s father-son. What is Y to X?
(A) Daughter
(B) Sister
(C) Mother
(D) None of these
Q355. D is A’s son. C is the mother of P and wife of D. How is A related to C?
(A) Father
(B) Uncle
(C) Father-in-law
(D) None of these
Q356. Semiconductors e.g., germanium, silicon are substances whose electrical conductivity lies in between?
(A) Metals and non-metals
(B) Solids and liquids
(C) Conductors and insulators
(D) Superconductors and insulators
Q357. Cold : Hot :: Bright : ?
(A) Shine
(B) Night
(C) Dark
(D) Heat
Q358. The miser gazed?at the pile of gold coins in front of him.
(A) Earnestly
(B) Thoughtfully
(C) Avidly
(D) Admiringly
Q359. Torque is a ?
(A) vector quality
(B) scalar quality
(C) solar quality
(D) none
Q360. The velocity time graph is straight line with time axis then acceleration is? Positive, Negative, Zero, Variable?
(A) Positive
(B) Negative
(C) Zero
(D) Variable
Q361. A Carnot engine, with its cold body at 17°C, has 50% efficiency. If the temperature of its hot body is now increased by 145°C, the efficiency becomes ?
(A) 45%
(B) 55%
(C) 60%
(D) None of these
Q362. Active voice of "Her face is being washed by Huma".
(A) Huma has washed her face.
(B) Huma will wash her face.
(C) Huma is washing her face.
(D) Huma washes her face.
Q363. What one is the best like the other three? Dog, Cow, Tiger, Snake?
(A) Dog
(B) Cow
(C) Tiger
(D) Snake
Q364. Find the odd one out in the given series: 51,64,121,144,256?
(A) 51
(B) 121
(C) 144
(D) 256
Q365. Choose the odd one out? 17458, 13762, 13545, 29498, 27993?
(A) 17458
(B) 13762
(C) 13545
(D) 29498
Q366. Find the odd one out? July, March, December, and February?
(A) July
(B) March
(C) December
(D) February
Q367. Semi-conductor germanium and silicon are?
(A) Pentavalent
(B) Trivalent
(C) Divalent
(D) Tetravalent
Q368. The element present in large amount of rock and mineral?
(A) Carbon
(B) Silicon
(C) Hydrogen
(D) Mineral
Q369. In molluscs, body is covered by a glandular epithelial envelope called.
(A) Radulla
(B) Shell
(C) Mantle
(D) Haemocyanin
Q370. These are the two most common elements in the earth crust?
(A) Nitrogen and silicon
(B) Oxygen and Silicon
(C) Silicon and nitrogen
(D) Silicon and phosphorous
Q371. Gap between semiconductor?
(A) Half filled
(B) Very wide
(C) Partially filled
(D) None of these
Q372. The cause of the potential barrier in a PN diode is ?
(A) Depletion of positive charges near the junction
(B) Concentration of positive and negative charges near the junction
(C) Depletion of positive and negative charges near the junction
(D) None of these
Q373. The reverse current in the diode is due to?
(A) Majority carriers
(B) Minority carriers
(C) Thermal carriers
(D) Hole carriers
Q374. What is the minimum number of diodes required for full-wave rectification?
(A) 1
(B) 2
(C) 3
(D) 4
Q375. The number of terminals in semiconductor diode are ?
(A) 5
(B) 3
(C) 2
(D) None of these
Q376. Heat is the form of ?
(A) Pressure
(B) Weight
(C) Energy
(D) None of these
Q377. What comes next in the pattern: CAB, GEF, ?
(A) HIG
(B) KJI
(C) IJK
(D) MNO
Q378. Which one is different from rest? Shirt, Pant, Boat, Necktie?
(A) Shirt
(B) Pant
(C) Boat
(D) Necktie
Q379. If 5 glasses of lemon juice cost 75, what will be the price of 9 glasses?
(A) 105
(B) 120
(C) 135
(D) 150
Q380. If 10 men cover 10 km in 3 days, how much distance will 3 men cover in 3 days?
(A) 1 km
(B) 2 km
(C) 3 km
(D) 4 km
Q381. Which one is different from the rest? Yard, Foot,Kilometer, Length?
(A) Yard
(B) Foot
(C) Kilometer
(D) Length
Q382. Find the odd one out: 10, 25, 45, 54, 60, 75, 80.
(A) 10
(B) 54
(C) 75
(D) 45
Q383. What number will come next? 1, 2, 4, 8, 16, ?
(A) 30
(B) 34
(C) 32
(D) 31
Q384. Which word is wrongly spelt in the following set of words? Relief, Sleeve, Speech, Recieve?
(A) Relief
(B) Sleeve
(C) Speech
(D) Recieve
Q385. Correct spelling is: A Sartify B Certify C Certiffy D Certafy?
(A) Sartify
(B) Certify
(C) Certiffy
(D) Certafy
Q386. ?you get up early, make a glass of water.
(A) As soon as
(B) When
(C) If
(D) Unless
Q387. You must obey your parents. Passive Voice ?
(A) Your parents must obeyed by you
(B) Your parents must been obeyed by you
(C) Your parents must be obeyed by you
(D) Your parents must being obeyed by you
Q388. Antonym of Minority is?
(A) Large number
(B) Minority
(C) Maximum
(D) Plenty
Q389. Synonym of Minority is?
(A) Majority
(B) Subset
(C) Large group
(D) Crowd
Q390. The capacity to do work is called?
(A) Energy
(B) Motion
(C) Force
(D) Momentum
Q391. The product of force and displacement is called?
(A) Efficiency
(B) Work
(C) Energy
(D) Torque
Q392. Displacement is an example of a ?quantity?
(A) Physical
(B) Chemical
(C) Scalar
(D) Vector
Q393. Which of the following has strongest intermolecular forces of attraction ?
(A) Hydrogen H2
(B) B. Chlorine Cl2
(C) lodine I2
(D) Methane CH4 .
Q394. A magnetic field exerts a force on a charged particle ?
(A) If the particle is at rest
(B) If the particle moving across the field lines
(C) If the particle moving along the field lines
(D) None of these
Q395. Force on a moving charge in a uniform magnetic field depends upon?
(A) Magnetic flux density
(B) The charge on the particle
(C) The speed of particle
(D) All of the above
Q396. The force of a magnet at the center is?
(A) More power
(B) Less power
(C) No power
(D) Double power
Q397. Convex lens is ?in center?
(A) Thick
(B) Thin
(C) Hollow
(D) Center
Q398. An image formed by a convex lens is called?
(A) Real and Inverted
(B) Real and Upright
(C) Virtual and Inverted
(D) Virtual and Upright
Q399. How many types of convex lens?
(A) 1
(B) 2
(C) 3
(D) 4
Q400. What is the work function of the metal if the light of wavelength 4000λ generates photo electrons of velocity 6 × 10^5 ms^-1 from it?
(A) 2.1 eV
(B) 4.0 eV
(C) 3.1 eV
(D) None of these
Q401. An examples of kinetic energy would be ?
(A) A moving car
(B) A moving runner
(C) A moving bicycle
(D) All of these
Q402. What is the reason of kinetic energy?
(A) Resistance
(B) Motion
(C) Object
(D) All of these
Q403. The time period of a simple pendulum depends upon the?
(A) Mass
(B) Frequency
(C) Force
(D) Length
Q404. The ratio of output voltage to input voltage in a transistor is called ?
(A) Amplification ratio
(B) Voltage gain of the amplifier
(C) Voltage loss of the amplifier
(D) None of these
Q405. A light year is related to ?
(A) Time
(B) Distance
(C) Frequency
(D) None of these
Q406. +5 - +7 = ?
(A) -12
(B) -2
(C) 12
(D) None of these
Q407. Which one is different from the rest? Red, Blue, Square, Green?
(A) Red
(B) Blue
(C) Square
(D) Green
Q408. Different from the rest? 3, 7, 11, 14, 17, 21?
(A) 7
(B) 11
(C) 14
(D) 21
Q409. Which one is different from the rest? Karachi, Kabul, Tehran, Beijing?
(A) Karachi
(B) Kabul
(C) Tehran
(D) Beijing
Q410. N-type material consists of?
(A) Electron
(B) Proton
(C) Neutron
(D) None of these
Q411. Which one is different from the rest? Karachi, Kabul, Delhi, Dhaka?
(A) Karachi
(B) Kabul
(C) Delhi
(D) Dhaka
Q412. Synonyms Perfect?
(A) Comfortable
(B) Fawless
(C) Best
(D) Complete
Q413. The synonym of PATRONAGE is?
(A) Attack
(B) Hinder
(C) Support
(D) All of these
Q414. Two masses attract each other; the force is called ?
(A) Push
(B) Friction
(C) Gravitational force
(D) None of these
Q415. How many kinds of International System of Units have?
(A) 1
(B) 5
(C) 3
(D) 7
Q416. What is the sensitive instruments which represents presence of current?
(A) Ammeter
(B) Kilometer
(C) Voltmeter
(D) Galvanometer
Q417. Synonym of Incompatible is?
(A) Capable
(B) Reasonable
(C) Faulty
(D) Mismatched
Q418. Which one is different from the rest? 2, 4, 20, 5?
(A) 2
(B) 4
(C) 20
(D) 5
Q419. In a class 33 students can speak Sindhi and 22 can speak both Urdu and Sindhi. How many students can speak only Sindhi?
(A) 11
(B) 22
(C) 33
(D) 44
Q420. The time period is reciprocal of?
(A) Velocity
(B) Speed
(C) Frequency
(D) None of these
Q421. Which term is defined as the measure of an instrument by which it is error-free?
(A) Precision
(B) Sensitivity
(C) Resolution
(D) Accuracy
Q422. Work done per unit time is called ?
(A) Efficiency
(B) Energy
(C) Power
(D) Force
Q423. The floating and sinking of objects depend on which one of the following?
(A) Density
(B) Volume
(C) Mass
(D) Weight
Q424. The motion repeated in periods?
(A) Longitudinal
(B) Crest
(C) Trough
(D) Periodic
Q425. Antonym of invariable is?
(A) Constant
(B) Steady
(C) Flexible
(D) Fixed
Q426. If the length of a simple pendulum is made four times, then its Time period will become ?
(A) Double
(B) Half
(C) One fourth
(D) None of these
Q427. What will be the time period of a simple pendulum in a freely falling lift?
(A) √1/2g
(B) ∞
(C) 0
(D) None of these
Q428. The value of gravitational acceleration changed by altitude?
(A) Increase
(B) Decrease
(C) Become zero
(D) Neutral
Q429. The value of gravitational acceleration at poles is ?
(A) Lower
(B) Constant Newton's third law of motion
(C) Higher
(D) None of these
Q430. What is the approximate value of gravitational acceleration on Earth?
(A) 8.9 m/s²
(B) 9.8 m/s²
(C) 10.5 m/s²
(D) 11.2 m/s²
Q431. The unit of inertia depends on?
(A) Mass
(B) Force
(C) Stress
(D) Displacement
Q432. What percent of 90 is 8?
(A) 8.88%
(B) 8.87%
(C) 8.89%
(D) None of these
Q433. Which one is different from rest 3 5 7 9?
(A) 3
(B) 5
(C) 7
(D) 9
Q434. If month is 4th day of the month, 18th day of the month will be?
(A) Monday
(B) Tuesday
(C) Wednesday
(D) Friday
Q435. Which one is different from the rest? Islamabad, Karachi, Lahore, Pakistan?
(A) Islamabad
(B) Karachi
(C) Lahore
(D) Pakistan
Q436. Synonym of Invariable is?
(A) Temporary
(B) Constant
(C) Optional
(D) Irregular
Q437. The density of water is ?
(A) 2 g/cm3
(B) 1.5 g/cm3
(C) 1 g/cm3
(D) None of these
Q438. The work done by friction is ?
(A) Zero
(B) Positive
(C) Negative
(D) None of these
Q439. Leaser is ?part of physics?
(A) Mathematical
(B) Atomic
(C) Chemical
(D) None of these
Q440. She ?a magazine.
(A) Has
(B) Live
(C) Reads
(D) Go
Q441. I am just ?out my new mobile.
(A) Testing
(B) Probing
(C) Finding
(D) Trying
Q442. Longitudinal waves consist of?
(A) Crest
(B) Trough
(C) Both A and B
(D) None of these
Q443. In a reflection ray angle of incidence is ?to the angle of reflection.
(A) Equal
(B) Opposite
(C) Multiple
(D) Sum
Q444. Which of the following is longitudinal waves? Sound waves ,Light waves, Water waves, Electromagnetic waves?
(A) Sound waves
(B) Light waves
(C) Water waves
(D) Electromagnetic waves
Q445. The relationship between stress and strain is called - law?
(A) Hooke's law
(B) Newton's Law
(C) Pascal Law
(D) None
Q446. How many types of motion ?
(A) 2
(B) 3
(C) 4
(D) 5
Q447. What happens when two opposite poles of magnets are brought close to each other?
(A) They repel
(B) They attract
(C) They make an electric current flow
(D) None
Q448. Get?the Bus .
(A) In
(B) On
(C) Over
(D) Into
Q449. The waves produced by oscillation of material particles are ?
(A) Electromagnetic waves
(B) Transverse waves
(C) Mechanical waves
(D) None of these
Q450. Waves which can only travel through a medium are called mechanical waves. Which one of the following is not a mechanical wave?
(A) Water wave
(B) Sound wave
(C) Seismic wave
(D) Infra-red wave
Q451. She ?a uniform.
(A) Wears
(B) Wear
(C) Wearing
(D) None of these
Q452. Correction: He gave me many advices.
(A) He give me many pieces of advice
(B) He gave me many pieces of advice
(C) He gave me many piece of advice
(D) None of these
Q453. Antonyms of SLOWLY.
(A) Quickly
(B) Swiftly
(C) loudly
(D) gradually
Q454. The synonym of BREVITY is?
(A) Banter
(B) Chaos
(C) Shortness
(D) None of these
Q455. I asked him ?help.
(A) In
(B) About
(C) For
(D) By
Q456. The Antonym of Expensive is?
(A) Costly
(B) Fancy
(C) Cheap
(D) None of these
Q457. We get up early ?the morning .
(A) On
(B) To
(C) From
(D) In
Q458. A mechanical appliance which can work on ?principle is a hydraulic system.
(A) Graham's
(B) Pascal's
(C) Morgan's
(D) None of these
Q459. Which one among the following is a quick source of energy?
(A) Glycogen
(B) Glucose
(C) Fats
(D) None of these
Q460. Pepsin is an enzyme that digests ?.
(A) Proteins
(B) Starch
(C) Carbohydrate
(D) Fats
Q461. The respiratory surface of human is ?
(A) Nostril
(B) Bronchiole
(C) Alveoli
(D) Trachea
Q462. The food chain always starts from ?
(A) Producers
(B) Consumers
(C) Decomposers
(D) Predators
Q463. In all plants, the major sites of photosynthesis are----.
(A) Leaves
(B) roots
(C) stems
(D) All of the above
Q464. The name of the scientist who proposed extension of cell theory is?
(A) Newton
(B) Robert Bentley
(C) Rudolf Virchow
(D) David Bellamy
Q465. All are postulates of cell theory except?
(A) New cell is derived from pre-existing cells
(B) Cell does not contain the hereditary material
(C) All living organisms are made up of one or more cells
(D) Cell is the fundamental unit of life
Q466. Cell theory was given by ?
(A) Matthias Schleiden
(B) Theodor Schwann
(C) Both A and B
(D) None of these
Q467. F = kx is the mathematical expression of:?
(A) Newton’s law
(B) Hooke’s law
(C) Lenz’s law
(D) Faraday’s law
Q468. Glycolysis converts?
(A) Glucose into pyruvate
(B) Fructose into pyruvate
(C) Both
(D) None
Q469. Glycolysis is ……..
(A) Produced no ATP
(B) Takes place in Cytoplasm
(C) Is the same as fermentation
(D) None of these
Q470. The process of removing salts and other impurities from seawater to make it suitable for drinking and irrigation is called?
(A) Water purification
(B) Water recycling
(C) Water harvesting
(D) Water Desalination
Q471. Antonym of Lovely is?
(A) Beautiful
(B) Horrible
(C) Charming
(D) Pleasant
Q472. Potential energy of Mass M at Height H is?
(A) mgh
(B) ½ mv²
(C) qV
(D) None of these
Q473. Which gate gives output 1 if any input is 1?
(A) OR gate
(B) AND gate
(C) NOT gate
(D) None of these
Q474. The Fermi level in an intrinsic semiconductor lies?
(A) Near the valence band
(B) Near the conduction band
(C) In the middle of the valence and conduction bands
(D) At infinity
Q475. The work done in moving a charge in a closed loop in a magnetic field is ?
(A) Zero
(B) Positive
(C) Negative
(D) Neutral
JobJunction.pk Official Examination Key

Official Solved Key • Pakistan Air Force PAF Aero Trade and Commission Mock Test

Q.NoKey Q.NoKey Q.NoKey Q.NoKey Q.NoKey
Q1 C Q96 A Q191 A Q286 A Q381 D
Q2 C Q97 B Q192 A Q287 C Q382 B
Q3 B Q98 A Q193 C Q288 B Q383 C
Q4 B Q99 A Q194 B Q289 B Q384 D
Q5 B Q100 C Q195 A Q290 B Q385 B
Q6 C Q101 B Q196 A Q291 C Q386 B
Q7 B Q102 A Q197 B Q292 B Q387 C
Q8 B Q103 D Q198 C Q293 B Q388 A
Q9 B Q104 D Q199 C Q294 D Q389 B
Q10 C Q105 A Q200 C Q295 B Q390 A
Q11 B Q106 B Q201 A Q296 B Q391 B
Q12 C Q107 C Q202 D Q297 A Q392 D
Q13 B Q108 B Q203 C Q298 D Q393 C
Q14 C Q109 C Q204 B Q299 A Q394 B
Q15 D Q110 A Q205 B Q300 C Q395 D
Q16 C Q111 C Q206 A Q301 A Q396 C
Q17 D Q112 B Q207 B Q302 B Q397 A
Q18 B Q113 A Q208 C Q303 B Q398 A
Q19 C Q114 B Q209 A Q304 C Q399 C
Q20 D Q115 C Q210 A Q305 A Q400 A
Q21 C Q116 A Q211 C Q306 A Q401 D
Q22 A Q117 D Q212 C Q307 C Q402 B
Q23 B Q118 B Q213 B Q308 B Q403 D
Q24 B Q119 A Q214 B Q309 B Q404 B
Q25 C Q120 D Q215 C Q310 C Q405 B
Q26 C Q121 C Q216 B Q311 A Q406 B
Q27 C Q122 B Q217 C Q312 C Q407 C
Q28 B Q123 C Q218 B Q313 A Q408 C
Q29 C Q124 D Q219 D Q314 B Q409 A
Q30 A Q125 C Q220 C Q315 D Q410 A
Q31 B Q126 B Q221 C Q316 B Q411 A
Q32 A Q127 B Q222 A Q317 B Q412 B
Q33 A Q128 A Q223 C Q318 A Q413 C
Q34 C Q129 C Q224 D Q319 B Q414 C
Q35 C Q130 B Q225 D Q320 A Q415 D
Q36 D Q131 B Q226 C Q321 D Q416 D
Q37 A Q132 A Q227 C Q322 D Q417 D
Q38 B Q133 B Q228 B Q323 C Q418 D
Q39 C Q134 B Q229 A Q324 B Q419 A
Q40 B Q135 B Q230 A Q325 A Q420 C
Q41 D Q136 D Q231 A Q326 A Q421 D
Q42 A Q137 B Q232 B Q327 A Q422 C
Q43 D Q138 A Q233 B Q328 D Q423 A
Q44 B Q139 C Q234 C Q329 C Q424 D
Q45 C Q140 D Q235 C Q330 B Q425 C
Q46 B Q141 A Q236 A Q331 A Q426 A
Q47 C Q142 A Q237 A Q332 A Q427 B
Q48 D Q143 C Q238 A Q333 B Q428 B
Q49 A Q144 A Q239 B Q334 B Q429 C
Q50 A Q145 A Q240 D Q335 B Q430 B
Q51 D Q146 D Q241 B Q336 C Q431 A
Q52 B Q147 A Q242 A Q337 D Q432 C
Q53 C Q148 D Q243 D Q338 A Q433 D
Q54 A Q149 A Q244 B Q339 A Q434 A
Q55 D Q150 A Q245 C Q340 C Q435 D
Q56 C Q151 D Q246 C Q341 B Q436 B
Q57 C Q152 B Q247 C Q342 A Q437 C
Q58 D Q153 A Q248 B Q343 A Q438 C
Q59 A Q154 C Q249 B Q344 A Q439 B
Q60 D Q155 C Q250 B Q345 D Q440 C
Q61 B Q156 C Q251 D Q346 A Q441 D
Q62 C Q157 C Q252 B Q347 C Q442 C
Q63 A Q158 B Q253 A Q348 C Q443 A
Q64 C Q159 C Q254 C Q349 A Q444 A
Q65 C Q160 B Q255 B Q350 C Q445 A
Q66 A Q161 B Q256 A Q351 A Q446 C
Q67 D Q162 C Q257 C Q352 B Q447 B
Q68 B Q163 A Q258 C Q353 A Q448 B
Q69 B Q164 A Q259 D Q354 A Q449 C
Q70 D Q165 A Q260 B Q355 C Q450 D
Q71 A Q166 C Q261 D Q356 C Q451 A
Q72 A Q167 D Q262 B Q357 C Q452 B
Q73 A Q168 B Q263 A Q358 C Q453 A
Q74 C Q169 B Q264 C Q359 A Q454 C
Q75 D Q170 C Q265 B Q360 C Q455 C
Q76 D Q171 B Q266 C Q361 C Q456 C
Q77 A Q172 B Q267 A Q362 C Q457 D
Q78 B Q173 C Q268 A Q363 D Q458 B
Q79 D Q174 A Q269 C Q364 A Q459 B
Q80 B Q175 C Q270 A Q365 C Q460 A
Q81 D Q176 B Q271 A Q366 D Q461 C
Q82 A Q177 D Q272 A Q367 D Q462 A
Q83 A Q178 A Q273 D Q368 B Q463 A
Q84 C Q179 A Q274 B Q369 C Q464 C
Q85 C Q180 C Q275 B Q370 B Q465 B
Q86 C Q181 A Q276 A Q371 B Q466 C
Q87 A Q182 B Q277 B Q372 C Q467 B
Q88 C Q183 A Q278 A Q373 B Q468 A
Q89 D Q184 C Q279 B Q374 D Q469 B
Q90 C Q185 B Q280 B Q375 C Q470 D
Q91 B Q186 C Q281 B Q376 C Q471 B
Q92 B Q187 D Q282 A Q377 B Q472 A
Q93 D Q188 C Q283 B Q378 C Q473 A
Q94 C Q189 B Q284 C Q379 C Q474 C
Q95 C Q190 B Q285 A Q380 C Q475 A

Detailed Explanations and Past Paper Solutions

Q1: Which mountain pass connects Pakistan with China through the Karakoram Highway?
Correct Answer: (C) Khunjerab Pass
The Khunjerab Pass at an elevation of 4,693 meters connects Gilgit-Baltistan with Xinjiang province of China.
Source: NTS NAT 2024
Q2: Sound waves require a material medium and cannot propagate through which of the following?
Correct Answer: (C) Vacuum
Sound is a mechanical longitudinal wave requiring particles to vibrate. In a complete vacuum (absence of matter), sound waves cannot travel.
Source: PAF Aero Trade 2024
Q3: Fill in the blank with the appropriate preposition: 'He is senior ___ me in rank and service.'
Correct Answer: (B) to
Latin comparatives ending in '-ior' (senior, junior, superior, inferior, prior) are followed by the preposition 'to', never 'than'.
Source: Pak Navy Cadet 2024
Q4: What is the Least Common Multiple LCM of the numbers 12 and 18?
Correct Answer: (B) 36
Multiples of 12: 12, 24, 36, 48... Multiples of 18: 18, 36, 54... The smallest common multiple is 36.
Source: PAF Initial Test 2024
Q5: Newton first law of motion is fundamentally known as the Principle or Law of:
Correct Answer: (B) Inertia
Newton's first law states that an object remains at rest or in uniform motion unless acted upon by a net external force. This resistance to change in motion is termed inertia.
Source: PAF Initial Test 2024
Q6: What is the standard International System SI unit of electric current?
Correct Answer: (C) Ampere
The Ampere (symbol: A) is the base SI unit of electric current, defined by fixing the numerical value of elementary charge e.
Source: Pak Navy Sailor Exam 2024
Q7: Pakistan successfully conducted its nuclear tests in the Ras Koh Hills of Chagai on which historic date?
Correct Answer: (B) 28 May 1998
Pakistan conducted 5 nuclear tests on 28 May 1998 in response to Indian nuclear tests, celebrated annually across Pakistan as Youm-e-Takbeer.
Source: Pak Army Initial 2024
Q8: What is the standard value of acceleration due to gravity g on the surface of the Earth?
Correct Answer: (B) 9.8 m/s²
The standard acceleration due to Earth's gravity at sea level is approximately 9.80665 m/s² (commonly rounded to 9.8 m/s²).
Source: PAF Aero Trade 2024
Q9: Which optical device or lens is used to correct Myopia (nearsightedness) in human vision?
Correct Answer: (B) Concave lens
Myopia occurs when incoming light focuses in front of the retina. A diverging (concave) lens spreads the light rays outwards before they enter the eye, allowing them to focus directly on the retina.
Source: Pak Navy Cadet 2024
Q10: The only elemental metal that is liquid at room temperature is?
Correct Answer: (C) Mercury
Mercury Symbol: HgAtomic number: 80Melting point: -38.83 °CAtomic mass: 200.59 uLast verified on 13-03-2026
Source: Islamabad Police Past Paper
Q11: She is afraid ?the dog/darkness.
Correct Answer: (B) Of
Prepositions are used to connect words and show relationships.The phrase “afraid” is commonly used to show fear.The correct preposition after “afraid” is “of”.It is used to express fear of a person, thing, or situation.Last verified on 04-05-2026
Source: Islamabad Police Past Paper
Q12: How many hours are there in a week?
Correct Answer: (C) 168
7 days × 24 hours = 168 hoursLast verified on 24-08-2026
Source: PAF Air Force Commission Past Paper
Q13: What is the formula of power?
Correct Answer: (B) P=W/t
Power is the amount of energy transferred or converted per unit timeMathematical formula: P = Work ÷ Time.Power is a scalar quantity.Common symbols: PSI unit: watt W In SI base units: kg⋅m2⋅s−3Dimension unit: M L^2 T^− 3Last updated 13-March-2026
Source: PAF Air Force Commission Past Paper
Q14: Lenz' Law can explain ?
Correct Answer: (C) Diamagnetism only
Lenz’s Law states that the induced current opposes the change that produces it.When a magnetic field is applied, induced currents in atoms oppose the applied field.This opposing effect explains the behavior of diamagnetic materials.Paramagnetism and ferromagnetism are explained mainly by electron spin and magnetic domains, not Lenz’s law.Therefore, Lenz’s Law helps explain diamagnetism only.Last updated 13-March-2026
Source: PAF Air Force Commission Past Paper
Q15: In a transverse wave, the distance between two successive/adjacent crests or troughs of a wave is called ?
Correct Answer: (D) Wavelength
Wavelength is the distance between two successive crests or two successive troughs in a transverse wave.It represents one complete cycle of a wave.Additional information:Symbol used: λ Lambda SI unit: meter m Wave formula: v = fλExample wavelength values: 1 m, 0.5 m, 10 cm, 500 nm, 700 nmVisible light wavelength range: ~400 nm - 700 nmLast verified on 12-03-2026
Source: PAF Air Force Commission Past Paper
Q16: The median of 3,1,8,6,9 is ?
Correct Answer: (C) 6
Arrange in order: 1, 3, 6, 8, 9Middle value: 6Last verified on 11-03-2026
Source: PAF Air Force Commission Past Paper
Q17: The Synonym of Munificent is?
Correct Answer: (D) Both B and C
Munificent means مہربانPhilanthropic means انسان دوستGenerous means مہربانLast verified on 14-06-2026
Source: PAF Air Force Commission Past Paper
Q18: The SI unit of Electrical Resistance is ?
Correct Answer: (B) Ohms Ω
The SI unit of electrical resistance is Ohm Ω .It measures how much a material opposes the flow of electric current.Higher resistance means less current flows.It is defined by V = IR Ohm’s Law .1 Ohm = 1 Volt per Ampere.Last verified on 10-06-2026
Source: PAF Air Force Commission Past Paper
Q19: In the sentence "He runs fast", The word Fast is a?
Correct Answer: (C) Adverb
“Fast” is an adverb in this sentence because it describes how he runs.It modifies the verb “runs.”Adverbs explain manner, place, time, or degree.Here it shows the manner of action how he runs .Last verified on 08-06-2026
Source: PAF Air Force Commission Past Paper
Q20: A device that converts mechanical energy into electric energy is called ?
Correct Answer: (D) Generator
An electric generator is a device that converts mechanical energy into usable electrical energy.This process is based on the principle of electromagnetic induction.Discovered in 1831 by British scientist Michael Faraday.Last verified on 27-04-2026
Source: PAF Air Force Commission Past Paper
Q21: The Antonym of Stale is?
Correct Answer: (C) Fresh
Stale means باسیFresh means تازہLast verified on 05-06-2026
Source: PAF Air Force Commission Past Paper
Q22: The current through a conductor between two points is directly proportional to the voltage across the two points, is known as?
Correct Answer: (A) Ohm’s law
Ohm's law, description of the relationship between current, voltage, and resistance. Georg Simon Ohm stated that the electric current through a conductor is directly proportional to the voltage across it, provided temperature remains constant. This relationship is called Ohm’s Law.Last verified on 22-05-2026
Source: PAF Air Force Commission Past Paper
Q23: AND, OR, XOR, NOT, NAND, NOR are which type of gate?
Correct Answer: (B) Logic gate
Logic gates are the fundamental building blocks of digital systems.The AND, OR, and NOT gates are the most fundamental logic gates.The NAND and NOR gates are called universal gates because they can be combined to produce OR, AND, and NOT gates.Last verified on 08-08-2026
Source: PAF Air Force Commission Past Paper
Q24: The equation E = mc² indicates that energy ?
Correct Answer: (B) And mass are closely related
Einstein's equation E=mc² shows that mass can be converted into energy and vice versa.c: Speed of light = 299,792,458 m/s ≈ 3×10⁸ m/s E: Energym: MassIt was proposed by Albert Einstein in 1905 as part of the Special Theory of Relativity.Last verified on 28-07-2026
Source: PAF Air Force Commission Past Paper
Q25: Geostationary satellites appear to be stationary when viewed from the Earth. Geostationary satellites are located directly above the ?
Correct Answer: (C) Equator
Geostationary satellites are located directly above the equator. Altitude: About 35,786 kilometers 22,236 miles above sea level.Speed and Direction: Moves from west to east, matching the Earth's rotation speed.Time Period: Exactly 24 hours one rotation day . Last updated 26-07-2026 by NA
Source: PAF Air Force Commission Past Paper
Q26: What is the sum of all angles in a triangle?
Correct Answer: (C) 180°
The sum of the three interior angles of a triangle is 180°.This rule applies to all types of triangles.If two angles are known, the third angle = 180° − sum of the other two angles .It is a basic rule of geometry. This property is known as the Angle Sum Property.Last updated 17 july 2026 by NA
Source: PAF Air Force Commission Past Paper
Q27: Who explained the Photoelectric Effect?
Correct Answer: (C) Albert Einstein
Albert Einstein explained the Photoelectric Effect in 1905 by proposing that light consists of tiny particles called photons.He showed that electrons are emitted from a metal surface when light of sufficient frequency falls on it.His explanation supported Quantum Theory.Einstein received the Nobel Prize in Physics in 1921 for this discovery.Last verified on 06-07-2026
Source: PAF Air Force Commission Past Paper
Q28: Which is the highest peak of Himalayas range in Pakistan?
Correct Answer: (B) Nanga Parbat
Nanga Parbat is the highest peak of the Himalayan range located in Pakistan.It is the 9th highest mountain in the world.It is known as the “Killer Mountain” due to its difficult climbing conditions.It is part of the western Himalayas in Gilgit-Baltistan.Height: 8,126 meters 26,660 ft Last verified on 13-05-2026
Source: PAF Air Force Commission Past Paper
Q29: Admin is capable ?doing anything.
Correct Answer: (C) Of
• The adjective “capable” always takes the preposition “of.”• Correct sentence: “Admin is capable of doing anything.”Examples:• Capable of solving problems• Capable of teaching students• Capable of managing work• Capable of making decisions• Capable of winning competitionsLast verified on 09-05-2026
Source: PAF Air Force Commission Past Paper
Q30: Who was the founder of Daily English Newspaper Dawn?
Correct Answer: (A) Quaid-e-Azam
Dawn newspaper was founded by Quaid-e-Azam Muhammad Ali Jinnah.It was established on 26 October 1941 in Delhi British India .The main purpose was to support the Muslim League’s political voice.It later became a major English newspaper of Pakistan after independence.Last verified on 03-05-2026
Source: PAF Air Force Commission Past Paper
Q31: The Synonym of Lethargy is?
Correct Answer: (B) Laxity
Lethargy means سستیLaxity means سستیLast verified on 24-04-2026
Source: PAF Air Force Commission Past Paper
Q32: Change into Indirect: He said, "Honesty is the best policy.“?
Correct Answer: (A) He said that Honesty is the best policy
He said that Honesty is the best policy.This sentence expresses a universal truth.In indirect speech, universal truths do not change tense.Only quotation marks are removed and “that” is added.The meaning remains exactly the same.Last verified on 20-04-2026
Source: PERA Sergeant Past Paper
Q33: She always helps ?poor.
Correct Answer: (A) The
The correct article before “poor” is “the”.“The poor” refers to all poor people as a group.It is a common grammar rule in English.“The + adjective” is used to represent a class of people.Last verified on 20-04-2026
Source: PERA Sergeant Past Paper
Q34: 1024 kilobytes is equal to ?
Correct Answer: (C) 1 megabyte
The size of information in the computer is measured in: 1024 kilobytes KB is equal to 1 megabyte MB .One Megabyte MB = 1024 Kilobytes KBOne Gigabyte GB = 1024 Megabytes MBOne Terabyte TB = 1024 gigabytes GB .
Source: PAF Air Force Commission Past Paper
Q35: Swim is to Fish as Walk is to?
Correct Answer: (C) Man
Swim is an action naturally associated with a fish.Just as walk is a natural action associated with a man.Both represent characteristic movements of the respective entities.Last verified on 31-03-2026
Source: PAF Air Force Commission Past Paper
Q36: Chose the antonyms of PIQUE?
Correct Answer: (D) Soothe
Pique بے زار کرنا، ناپسند یدگی کا اظہار کرنا، ناخوش کرناSoothe means سکون ملنا
Source: PERA Sergeant Past Paper
Q37: The law of inertia also called ?
Correct Answer: (A) First Law of Motion
Law of Inertia = Newton’s First Law of Motion.States: “An object at rest stays at rest, and an object in motion continues in the same direction and speed unless acted upon by an unbalanced force.”Explains why seat belts are important in cars.Applies to all objects on Earth and in space.Last verified on 13-03-2026
Source: PAF Air Force Commission Past Paper
Q38: The particles of a liquid?
Correct Answer: (B) Are free to move in a container but remain in close contact with one another
Liquids have no fixed shape but have a fixed volume.Particles are close together but can slide past each other, allowing the liquid to flow.Additional information:Solid: Are tightly packed and stay in a fixed positionGas: Are widely spaced and move freely in any directionLast verified on 13-03-2026
Source: PAF Air Force Commission Past Paper
Q39: For rectification, we use ?as a rectifier .
Correct Answer: (C) Diode
For rectification, we use a diode or p-n junction diode as a rectifier.Process: Converts AC to DCTypes: Half-wave, Full-wave, Bridge
Source: PAF Air Force Commission Past Paper
Q40: If FATHER → 431789, then HERE → ?
Correct Answer: (B) 7898
From FATHER → 431789, we map each letter: F = 4 A = 3 T = 1 H = 7 E = 8 R = 9 Now apply to HERE: H = 7 E = 8 R = 9 E = 8 So, HERE → 7898 Last updated by NS on 27-05-2026
Source: PAF Air Force Commission Past Paper
Q41: Dr. Abdul Salam won the Nobel Prize for the subject of ?
Correct Answer: (D) Physics
Dr. Abdus Salam won the Nobel Prize in Physics in 1979.He received the award for his contribution to the Electroweak Theory, which unified the electromagnetic and weak nuclear forces.Additional information:Born: 29 January 1926, Jhang, PunjabDied: 21 November 1996Ph.D.: 1952, Theoretical Physics, University of CambridgeAchievement: First Pakistani Nobel laureate and second Muslim Nobel laureateLast verified on 06-07-2026
Source: PPSC Junior Patrol Officer JPO Past Paper
Q42: Convex lenses are also known as ?
Correct Answer: (A) Converging lenses
Convex lenses are known as Converging lenses.Because they bring parallel light rays to a single focal point.A convex lens is thicker at the center and thinner at the edges.It forms real and inverted images when the object is beyond the focal length.It can also produce a virtual, erect, and magnified image when the object is placed within the focal length.Additional information:Concave lens is also called a diverging lens.Last verified on 11-03-2026
Source: PAF Air Force Commission Past Paper
Q43: The Antonym of Ductile is?
Correct Answer: (D) Rigid
Ductile means نرمRigid means سختLast verified on 03-07-2026
Source: PAF Air Force Commission Past Paper
Q44: Primary colors of white light are?
Correct Answer: (B) Red Green Blue
The primary colors of white light are Red, Green, and Blue RGB .White light is produced when these three colors of light combine in equal amounts.This is called the additive color model.RGB is used in screens, televisions, and digital displays.Additional information:The primary colors of Pigment is:RedYellowBlueLast verified on 25-06-2026
Source: PAF Air Force Commission Past Paper
Q45: Kyoto is located in which country?
Correct Answer: (C) Japan
Kyoto is a historic city in Japan known for its rich culture and heritage.It served as the capital of Japan until 1868.The city was originally founded in 794 AD as Heian-kyō.Today, it is famous for temples, shrines, and traditional Japanese culture.Last verified on 23-06-2026
Source: PAF Air Force Commission Past Paper
Q46: Senate of Pakistan consists of how many members?
Correct Answer: (B) 96
After 18th Amendment Strength: 104 membersProvincial Representation: 23 members per provinceAfter 2024 Elections: 96 membersDetails of Seats of Senate of PakistanProvince/TerrotoryGeneralTechnocrat/UlemaWomenNon-MuslimTotalSindh1444123Punjab1444123Balochistan1444123KPK1444123ICT211-4Grand Total581717496Last verified on 03-05-2026
Source: PAF Air Force Commission Past Paper
Q47: The Antonym of Gumption Imagination is?
Correct Answer: (C) Apathy Lethargy
Gumption means ہمت، پہل، یا وسائلApathy means دلچسپی، توانائی، یا حوصلہ افزائی کی کمیLast verified on 20-06-2026
Source: PAF Air Force Commission Past Paper
Q48: The Synonym of Embezzle is?
Correct Answer: (D) Misappropriate
Embezzle means غبنMisappropriate means غلطLast verified on 05-06-2026
Source: PAF Air Force Commission Past Paper
Q49: P-type material consists of ?
Correct Answer: (A) Intrinsic 3D crystals of silicon
P-type semiconductor is made by doping pure silicon.Trivalent impurities like boron, aluminum, gallium are added.These atoms have 3 valence electrons.This creates holes positive charge carriers in the crystal.Last updated on 09-March-2026
Source: PAF Air Force Commission Past Paper
Q50: The 70% of 50 is ?
Correct Answer: (A) 35
70% of 50 = 0.7 × 50 = 35Last verified on 07-03-2026
Source: PAF Air Force Commission Past Paper
Q51: Why mercury is used as a thermometric fuild?
Correct Answer: (D) All of these
Mercury is used as a thermometric fluid Because it has several ideal properties like:High Boiling Point B.P Low Freezing Point not high M.P Stable and Uniform Coefficient of ExpansionVisibility and Non-wettabilityLast updated on 06-March-2026
Source: PAF Air Force Commission Past Paper
Q52: What is the dimensional formula of force?
Correct Answer: (B) M L T⁻²
Force is defined by Newton’s Second Law:Force=Mass×Acceleration Step 1: Write dimensions Mass = M Acceleration = L T⁻² because acceleration = length / time² Step 2: Multiply dimensions M × L T⁻² = M L T⁻² Dimensional Formula of Force M L T⁻² ​***1. Length - L 2. Mass - M 3. Time - T 4. Speed/Velocity - LT⁻¹ 5. Acceleration - LT⁻² 6. Force - MLT⁻² 7. Work/Energy - ML²T⁻² 8. Power - ML²T⁻³ 9. Pressure - ML⁻¹T⁻² 10. Density - ML⁻³ 11. Momentum - MLT⁻¹ 12. Impulse - MLT⁻¹ 13. Gravitational constant G - M⁻¹L³T⁻² 14. Planck’s constant h - ML²T⁻¹ 15. Charge - TI T = time, I = current 16. Potential di
Source: PAF Air Force Commission Past Paper
Q53: 90 % of 90 = ?
Correct Answer: (C) 81
90 percent *90= 90/100 *90= 90*90 /100= 8100/100 = 81Question updated 03-March-2026
Source: PAF Air Force Commission Past Paper
Q54: A wave transfers?
Correct Answer: (A) Energy
A wave transmits energy from one place to anotherWaves are disturbances that propagate through a medium.Particles of the medium oscillate around equilibrium but do not travel with the wave.The motion of particles transfers energy, not matter.Energy is carried in the form of kinetic and potential energy of oscillating particles.Last updated question 25 feb 2026
Source: PAF Air Force Commission Past Paper
Q55: Knife is to Cut as Pen is to ?
Correct Answer: (D) Write
A knife is a tool used to cut, similarly a pen is a tool used to write. This is an example of a tool-to-function analogy.Last verified on 15-02-2026
Source: PAF Air Force Commission Past Paper
Q56: The RMS value of an AC waveform is?
Correct Answer: (C) Maximum at 90° and minimum at 0°
The RMS Root Mean Square value of an AC waveform is the effective or equivalent DC value that produces the same heating effect power dissipation in a resistor as the AC signal It is calculated as the square root of the mean of the squares of instantaneous values over one cycle.For a sinusoidal AC wave:At 0°, the instantaneous value is zero minimum .At 90°, the instantaneous value reaches its maximum.Therefore, the RMS-related peak behavior corresponds to maximum at 90° and minimum at 0°.Last updated 14-feb-2026
Source: PAF Air Force Commission Past Paper
Q57: 70% of 70 =?
Correct Answer: (C) 49
70 × 70 = 4900, and 4900 ÷ 100 = 49.Last updated 14-feb-2026
Source: PAF Air Force Commission Past Paper
Q58: The most commonly used material in semiconductor devices is?
Correct Answer: (D) Silicon
Silicon is widely used in semiconductors because:It is abundant in nature.It has suitable electrical properties.It has excellent thermal stability.It forms a stable oxide layer SiO₂ useful in device fabrication.Note: Germanium was used earlier, and gallium nitride is used for high-power or high-frequency devices, but silicon remains the standard.Last updated 14-feb-2026
Source: PAF Air Force Commission Past Paper
Q59: Total percentage of silicon in earth crust ?
Correct Answer: (A) 27.72%
The total percentage of silicon in the Earth's crust is approximately 27.7% by weight.Additional informationAbundance: Second most abundant by weight ~ 28% and volume 0.9% .Occurrence: It does not exist in pure form in nature, but rather as oxides e.g., sand, quartz and silicates e.g., feldspar, mica, clay .Last updated 14-feb-2026
Source: PAF Air Force Commission Past Paper
Q60: Force per unit area is called ?
Correct Answer: (D) Pressure
Pressure is a fundamental physical quantity that is defined as the force exerted per unit area.It is a measure of the strength of a force acting on a surface.It is typically measured in units such as Pascals Pa or pounds per square inch PSI .Last verified on 10-02-2026
Source: PAF Air Force Commission Past Paper
Q61: A sad poem usually written to praise and express sorrow for someone who is dead is known as ?
Correct Answer: (B) Elegy
An elegy is a sad poemPurpose: To express grief, sorrow, or admiration for a deceased person.Origin: The term is derived from the Greek élegos, meaning "funeral lament".
Source: PAF Air Force Commission Past Paper
Q62: Sound Waves travel faster in a medium ?
Correct Answer: (C) Solid
Sound waves are mechanical waves and need a medium to travel.They travel fastest in solids, slower in liquids, and slowest in gases.Solid particles are closely packed, allowing rapid vibration transfer.Last verified on 04-02-2026
Source: PAF Air Force Commission Past Paper
Q63: The chemical name of quartz is:?
Correct Answer: (A) Silicon dioxide
The chemical name for quartz is silicon dioxideChemical Formula: SiO₂Composition: Silicon Si and Oxygen O Structure: A framework of silicon-oxygen tetrahedraCommon Names: Silica, Rock Crystal for the clear variety
Source: PAF Air Force Commission Past Paper
Q64: One Mega-Byte is equal to:?
Correct Answer: (C) 1024 Kilo Bytes
One megabyte, or MB, is equivalent to 1024 kilobytes, or KBThe smallest piece of data is the bit. The data will be transformed to its binary form.***byte = 8 bits1 kilobyte KB = 1024 bytes1 megabyte MB = 1024 kilobytes1 gigabyte GB = 1024 megabytes1 terabyte TB = 1024 gigabytes1 petabyte PB = 1024 terabytes
Source: PAF Air Force Commission Past Paper
Q65: To every action there is always an equal and opposite reaction. This is the statement of ?
Correct Answer: (C) Newton’s Third Law of Motion
The statement "To every action there is always an equal and opposite reaction" is Newton's Third Law of Motion. This law states that for every interaction between two objects, a pair of forces is produced - these forces are equal in magnitude and opposite in direction, acting on the interacting objects.
Source: PAF Air Force Commission Past Paper
Q66: The SI unit of electric power is?
Correct Answer: (A) Watt
Electric power: Rate of energy transfer.It is measured in watts W , or one joule per second.Energy/Work: Measured in joules J .Charge: Measured in coulombs C .Pressure: Measured in pascals Pa .Electric current: Measured in amperes A .Electric resistance: Measured in ohms Ω .Temperature: Measured in kelvin K .Torque: Measured in newton metres N m .Velocity: Measured in meters per second m/s .Acceleration: Measured in meters per second squared m/s² .
Source: PAF Air Force Commission Past Paper
Q67: In a p-type material/semi conductor the ?is the majority carrier.
Correct Answer: (D) Holes
The majority carriers in a p-type semiconductor are holes. When a semiconductor material is doped with trivalent impurity atoms like Boron , it creates "holes" where electrons are missing, effectively giving a positive charge. These holes then become the majority charge carriers, meaning they are the primary contributors to electrical current flow in the material.
Source: PAF Air Force Commission Past Paper
Q68: Steel is more elastic than Rubber because ?
Correct Answer: (B) Ratio of stress to strain is more
Steel is more elastic than rubber because the ratio of stress to strain is more for steel.This indicates that steel deforms less under the same amount of stress compared to rubber, making it more elastic.
Source: PAF Air Force Commission Past Paper
Q69: If the price of an item is increased by 20% and the new price is $60, what was the original price?
Correct Answer: (B) $50
To find the original price before the 20% increase, follow these steps:1. Let the original price be P. The price is increased by 20%, so the new price is 120% of the original price.New Price=1.20×Original Price2. Set up the equation using the given new price of $60:1.20×P=603. Solve for 𝑃= 60/ 1.20 = 50So, the original price was $50.
Source: PAF Air Force Commission Past Paper
Q70: The Antonym of ARROGANT is?
Correct Answer: (D) Both A and B
Arrogant means مغرور، تکبر یا گھمنڈیMeek means انکسارHumble means عاجز
Source: PAF Air Force Commission Past Paper
Q71: He is wealthy but he ?helps the poor.
Correct Answer: (A) Rarely
"Rarely" means not often, which fits the contrast given by "but" in the sentence.The sentence implies that despite being wealthy, he does not frequently help the poor.
Source: PAF Air Force Commission Past Paper
Q72: Which one among the following is a hydrocarbon compound? Candle wax, Polyurethane, Glycerol, Aspirin?
Correct Answer: (A) Candle wax
Hydrocarbon compounds are typically derived from fossil fuels and consist of hydrogen and carbon atoms.Examples include fuels like gasoline, natural gas, and propane, as well as waxes like candle wax and paraffin wax.
Source: PAF Air Force Commission Past Paper
Q73: A person who helps another to do a crime a?
Correct Answer: (A) Accomplice
Accomplice: A person who helps somebody to do something bad, especially a crime.
Source: PAF Air Force Commission Past Paper
Q74: Which uranium atoms undergo fission readily?
Correct Answer: (C) U²³⁵
Uranium-235 U²³⁵ is a fissile isotope, meaning it readily undergoes nuclear fission when struck by a neutron.It is commonly used in nuclear reactors and atomic bombs for this reason.
Source: PAF Air Force Commission Past Paper
Q75: Choose the correct spelling: Dipendant, Dependant, Dependent, Dependunt?
Correct Answer: (D) Both B and C
Dependent/Dependant means انحصار
Source: PAF Air Force Commission Past Paper
Q76: What do you understand by 'omniscient'?
Correct Answer: (D) One who has all knowledge
Omniscient ہر چیز کا علم رکھنے والا To be omniscient is to know everything. This often refers to a special power of God. If you combine the Latin roots omnis meaning "all" and scientia meaning "knowledge" , You'll get omniscient, meaning "knowledge of all."
Source: PAF Air Force Commission Past Paper
Q77: 1KWh = ?J?
Correct Answer: (A) 3.6 MJ
1 kilowatt-hour kWh is equivalent to 3.6 million joules MJ .As it represents the energy used when 1 kilowatt of power is consumed for 1 hour.1 kWh = 3.6 × 10⁶ J 3.6 MJ 1 J = 1 watt-second1 MJ = 10⁶ J
Source: PAF Air Force Commission Past Paper
Q78: Choose the correct spelling word: Embrass, Embarrass, Emberass, None of these?
Correct Answer: (B) Embarrass
The correct spelling word is Embarrass. Embarrass means شرمندہ
Source: PAF Air Force Commission Past Paper
Q79: A person who talks in his | her sleep is known as ?
Correct Answer: (D) Somniloquist
Somniloquist: وہ شخص جو نیند میں باتیں کرےA somniloquist is a person who talks in their sleep, according to online dictionaries. It's a form of parasomnia, which refers to abnormal behaviors during sleep. The term can also refer to the act of talking in one's sleep, known as somniloquy or sleep talking.
Source: PAF Air Force Commission Past Paper
Q80: A long poem narrating achievements of a hero or legendary figures is known as ?
Correct Answer: (B) Epic
Epic means a long narrative poem in elevated style recounting the deeds of a legendary or historical hero.
Source: PAF Air Force Commission Past Paper
Q81: The Synonym of Bewildered is?
Correct Answer: (D) Confused
Bewildered means پریشانConfused means پریشان
Source: PAF Air Force Commission Past Paper
Q82: What is the capital of Saudi Arabia?
Correct Answer: (A) Riyadh
Saudi Arabia Capital is Riyadh.Currency is the Saudi Riyal.The official language is Arabic.It is located in the Continent of Asia.The Primary Religion is Islam.The head of the Government is King and Prime Minister - Mohammed bin Salman.The Parliament, called Majlis Al Shura.Tricks for RememberRK12-12-2022
Source: PAF Air Force Commission Past Paper
Q83: Shirt is to dress as mango is to ?
Correct Answer: (A) Fruit
- A shirt is a type of dress. - A mango is a type of fruit.
Source: PAF Air Force Commission Past Paper
Q84: The Antonym of Artificial is?
Correct Answer: (C) Natural
Artificial means مصنوعی، قدرتی نہ ہوNatural means قدرتی
Source: PAF Air Force Commission Past Paper
Q85: The book is?the mug and pen.
Correct Answer: (C) Between
Between: دو لوگوں یا چیزوں کے درمیانAmong: دو سے زائد چیزوں کے درمیانThe book is between the mug and pen.Between is used when talking about the position of something relative to two distinct things.
Source: PAF Air Force Commission Past Paper
Q86: Mother was aware ?her children.
Correct Answer: (C) Of
We use "of" in the sentence "Mother was aware of her children" because: The word "aware" is usually followed by "of" to show what someone knows or notices.
Source: PAF Air Force Commission Past Paper
Q87: Galvanometer was made on the rules of ?
Correct Answer: (A) Electromagnetism
Galvanometer works on electromagnetic principles, where electric current produces a magnetic field.The interaction between magnetic field and coil causes the needle to deflect, allowing current measurement.A galvanometer measures small currents. To measure larger currents, a low resistance called a shunt is connected in parallel, converting it into an ammeter.
Source: PAF Air Force Commission Past Paper
Q88: The Antonym of Abridge is?
Correct Answer: (C) Extend
Abridge means خلاصہ کرنا ۔ مختصر کرناExtend means توسیع
Source: PAF Air Force Commission Past Paper
Q89: First Law of motion gives the definition of ?
Correct Answer: (D) Inertia
Newton's first law of motion defines inertia. It states that an object at rest stays at rest, And an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced external force. This tendency of an object to resist changes in its state of motion is called inertia.
Source: PAF Air Force Commission Past Paper
Q90: "Boat is to water" therefore "Plane is to?"?
Correct Answer: (C) Air
"Boat is to water" therefore "Plane is to air "
Source: PAF Air Force Commission Past Paper
Q91: Which of the following is the lightest metal? Mercury Lithium Lead Silver?
Correct Answer: (B) Lithium
Lithium is the lightest metal.Density of 0.534 g/cm³. It is an alkali metal, The third element on the periodic table,It is soft enough to be cut with a knife.Uses: Due to its low density and high reactivity, it's used in aircraft and, famously, in the production of batteries for electric vehicles and consumer electronics.
Source: PAF Air Force Commission Past Paper
Q92: The least count of Vernier caliper is ?
Correct Answer: (B) 0.2mm
The least count of a Vernier caliper is 0.02mm.It is the smallest measurement that can be accurately read using the instrument.It is derived from the difference between one main scale reading and one Vernier scale reading.It is commonly used to accurately measure outside diameters of shafts, thicknesses of various parts, diameters of holes or rings, internal dimensions of hollow jobs, and depths of holes or steps.
Source: PAF Air Force Commission Past Paper
Q93: A set of metabolism reaction which maintain internal environment is ?
Correct Answer: (D) Homeostasis
Homeostasis is the set of metabolic reactions that maintain the internal environment of an organism, regulating factors.Such as temperature, pH, blood sugar levels, and blood pressure.
Source: PERA Sergeant Past Paper
Q94: In which object, form sharp and dark shadows?
Correct Answer: (C) Opaque
Opaque objects form sharp and dark shadows because they block all light from passing through, creating a clear and defined shadow.
Source: PAF Air Force Commission Past Paper
Q95: Which City of Pakistan is famous for sports goods?
Correct Answer: (C) Sialkot
Sialkot is a city located in Punjab, Pakistan.It is the capital of the Sialkot DistrictSialkot is the 13th most populous city in PakistanSialkot is located in the north-east PunjabSialkot is one of Pakistan's most industrialized regions.The postal code of Sialkot is 51310The calling code of Sialkot is 052Sialkot is known for manufacturing and export of many items:such as surgical instrumentsmusical instrumentssports goodsleather goodstextile goods
Source: PAF Air Force Commission Past Paper
Q96: Brass is an alloy of ?
Correct Answer: (A) Zinc and copper
Brass is an alloy made by combining copper and zinc.It is commonly used for decorative items, musical instruments, and fittings due to its strength and resistance to corrosion.Bronze is an alloy consisting primarily of copper, commonly with about 12-12.5% tin.
Source: PAF Air Force Commission Past Paper
Q97: Which is the Currency of Indonesia?
Correct Answer: (B) Rupiah
Indonesia Capital is Jakarta.Indonesia Currency is Rupiah.Indonesia official language is Indonesian.Indonesia located is in Continent Asia.Indonesia's Primary Religion is Islam.Indonesia's Head of Govt. is President - Joko Widodo.Indonesia Parliament called People’s Consultative Assembly.Tricks for RememberRUPEEMind Tricks : PICS of MN***PICS***P - PakistanI - IndiaC - CeylonS - Srilanka**MN**M - MaritiusN - Nepal AGM25.01.23***ND5-2-2023
Source: PAF Air Force Commission Past Paper
Q98: Synonym of Dense is?
Correct Answer: (A) Thick
The synonym of Dense is Thick/ Heavy
Source: PAF Air Force Commission Past Paper
Q99: With the increase in temperature, heat will be?
Correct Answer: (A) Increase
As temperature increases, the heat energy of a substance also increases.This is because temperature is a measure of the average kinetic energy of the particles in a substance, and as temperature increases, the particles gain kinetic energy and therefore heat energy.
Source: PAF Air Force Commission Past Paper
Q100: A capacitor is a device used to store ?
Correct Answer: (C) Electric charge
A capacitor is a device used to store electrical charge and electrical energy. It consists of at least two electrical conductors separated by a distance.It is widely used in electronic circuits for filtering, timing, and energy storage.
Source: PAF Air Force Commission Past Paper
Q101: When the velocity of object becomes doubled then its kinetic energy becomes?
Correct Answer: (B) Fourth time
When the velocity of an object is doubled, its kinetic energy becomes four times its original value. This is because the kinetic energy formula KE = 1/2 * mv² shows that kinetic energy is directly proportional to the square of the velocity. Therefore, doubling the velocity 2v ² results in a fourfold increase in kinetic energy. kinetic energy ke = ½mv² if velocity is doubled → ke = ½m 2v ² = ½m 4v² = 4 times the original.
Source: PAF Air Force Commission Past Paper
Q102: The unit of frequency is ?
Correct Answer: (A) Hertz
Frequency is the number of occurrences of a repeating event per unit of time.The SI unit of frequency is the hertz Hz .1 Hz = 1 cycle or vibration per secondUnit: Hz = s⁻¹ per second Named after physicist Heinrich HertzUsed for waves, oscillations, sound, and electromagnetic radiationDerivations from other quantities: f = 1 / TDimension T^−1
Source: PERA Sergeant Past Paper
Q103: She is interested ?drawing and painting.
Correct Answer: (D) In
She is interested in drawing. We use "interested in" because "in" connects the feeling of interest to the activity or subject someone cares about.Pattern: be interested in + noun/verb-ing
Source: PAF Air Force Commission Past Paper
Q104: Boot is to foot as glove is to ?
Correct Answer: (D) Hand
A boot is a type of shoe worn on the foot, so a glove is a type of covering worn on the hand
Source: PAF Air Force Commission Past Paper
Q105: ATP is best defined as ?
Correct Answer: (A) The molecule that releases energy when the phosphate molecule is removed
ATP Adenosine Triphosphate stores energy in its high-energy phosphate bonds.Energy is released when the terminal phosphate bond is broken, forming ADP and phosphate.
Source: PAF Air Force Commission Past Paper
Q106: What is the energy stored in a capacitor if capacitance is 4 μF and voltage is 100 V?
Correct Answer: (B) 0.02 J
To find the energy stored in a capacitor, we use the formula:E=1/2​CV^2 Where: C=4μF=4×10^−6F V=100V Calculation: E = frac 1 2 times 4 times 10^ -6 times 100 ^2E=1​/2×4×10^−6× 100 ^2E=1/2​×4×10^−6×10000E=2×10^−6×10000=0.02J
Source: PAF Air Force Commission Past Paper
Q107: Newton's first law of motion is also called as?
Correct Answer: (C) Law of inertia.
Newton's first law of motion is also called as Law of inertia.Inertia is the ability of a body by virtue of which it opposes a change.According to Newton’s first law of motion, an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force.The inertia of rest: When a body is in rest, it will remain at rest until we apply an external force to move it. This property is called inertia of rest.The inertia of motion: When a body is in a uniform motion, it will remain in motion until we apply an external force to stop it. This property is called inertia
Source: PAF Air Force Commission Past Paper
Q108: Enzymes are made of ?
Correct Answer: (B) Protein
An enzyme is a biological catalyst and is almost always a protein.Enzymes are organic catalysts. A large protein enzyme molecule is composed of one or more amino acid chains called polypeptide chains. ******
Source: PAF Air Force Commission Past Paper
Q109: When resistances are connected in series, the current passing through them is ?
Correct Answer: (C) Same
- Current is the same through all resistors connected in series. - Total resistance R_total = R₁ + R₂ + R₃ + ... sum of all resistances . - Voltage divides across each resistor according to their resistance Ohm’s law: V = IR . - If one resistor breaks, the entire circuit stops working open circuit . - Series circuits have only one path for current flow.
Source: PAF Air Force Commission Past Paper
Q110: What is the standard form of a quadratic equation?
Correct Answer: (A) ax^2 + bx + c = 0
The standard form of a quadratic equation is ax^^2+bx+c=0.a, b, and c are constants.a ≠ 0; otherwise, it would not be quadratic.The highest power of x is 2.Example: 2x^2 + 3x -5=0.Last updated 25-07-2026 by NA
Source: PAF Air Force Commission Past Paper
Q111: If the 1st day of the month is a Monday, what is the date of the 3rd Friday of the month?
Correct Answer: (C) 19
Step 1: Identify the days of the week for the first few dates1st = Monday2nd = Tuesday3rd = Wednesday4th = Thursday5th = Friday 1st Friday Step 2: Add 7 days for subsequent Fridays2nd Friday = 5th + 7 = 12th3rd Friday = 12th + 7 = 19thFinal Answer: The 3rd Friday is on the 19th of the month.
Source: PAF Air Force Commission Past Paper
Q112: Charles's Law involves the relationship between?
Correct Answer: (B) V, T
Charles's Law:Volume V is directly proportional to temperature T at constant pressure.Formula: VT=k.Statement: At constant pressure, the volume of a fixed mass of gas is directly proportional to its absolute temperature in Kelvin .Mathematical Form: V₁ / T₁ = V₂ / T₂ Where: - V₁ = Initial volume - T₁ = Initial temperature in Kelvin - V₂ = Final volume - T₂ = Final temperature in Kelvin
Source: PAF Air Force Commission Past Paper
Q113: What is the mathematical statement of the first law of thermodynamics?
Correct Answer: (A) ΔE = q + W
The first law of thermodynamics is given as ΔE=q+w, where ΔE is the change in internal energy of a system, q is the net heat transfer the sum of all heat transfer into and out of the system , and w is the net work done the sum of all work done on or by the system .
Source: PAF Air Force Commission Past Paper
Q114: The dimension formula of angular momentum is?
Correct Answer: (B) M L² T⁻¹
Angular momentum = Moment of Inertia × Angular Velocity Moment of Inertia = Mass × Length ² → M L² - Angular Velocity = T⁻¹ = M L² × T⁻¹ = M L² T⁻¹ .....The dimensional formula of momentum is: M L T⁻¹
Source: PAF Air Force Commission Past Paper
Q115: The angular acceleration is produced by ?
Correct Answer: (C) Torque
Angular acceleration is produced by torque. Torque is the rotational equivalent of force. And just as force causes linear acceleration, torque causes angular acceleration.
Source: PAF Air Force Commission Past Paper
Q116: The focal length of thin convex lens is ?
Correct Answer: (A) Greater than that of thick convex lens
A thinner convex lens has a longer focal length because it bends light rays less sharply than a thicker convex lens.A thicker convex lens has a shorter focal length as it bends light rays more strongly, bringing them to focus sooner.
Source: PAF Air Force Commission Past Paper
Q117: The SI unit of power is ?
Correct Answer: (D) Watt
The SI unit of power is the watt W . A watt is equal to one joule of work done per second. Symbol: WDefinition: 1 watt = 1 joule per secondNamed after: James Watt
Source: PAF Air Force Commission Past Paper
Q118: What are the primary colours?
Correct Answer: (B) Yellow, Red, Blue
Three Primary Colors: Red YellowBlueThree Secondary Colors: OrangeGreenVioletSix Tertiary Colors: Red-Orange, Yellow-Orange, Yellow-Green, Blue-Green, Blue-Violet, Red-Violet
Source: PAF Air Force Commission Past Paper
Q119: Which of the following has a coordinate bond?
Correct Answer: (A) NH₃BF₃
In NH₃BF₃, nitrogen donates a lone pair of electrons to boron.It forming a coordinate bond, where both electrons in the bond come from the same atom.
Source: PAF Air Force Commission Past Paper
Q120: Jerusalem is the Holy City of ?
Correct Answer: (D) All of them
Jerusalem is located in Israel.Area: 125.1 km²Founded: 3000 BCPopulation: 874,186 2016 United NationsJerusalem is considered by many to be one of the holiest places in the world.Jerusalem largest city in Israel.Jerusalem is a site of major significance for the three largest monotheistic religions:Judaism, Islam, Christianityboth Israel and Palestine have claimed Jerusalem as a capital city.Israel captured the West Bank and East Jerusalem in the 1967 Middle East War.
Source: PAF Air Force Commission Past Paper
Q121: The instrument used to measure blood pressure is?
Correct Answer: (C) Sphygmomanometer
A sphygmomanometer also known as a blood pressure monitor.It is a device used to measure blood pressure.A normal blood pressure level of 120/80 mmHg.High-normal: 130 to 139 mmHgHigh: Greater than 140 mmHgwhilemmHg stands for "Millimeter of Mercury"
Source: PAF Air Force Commission Past Paper
Q122: Complete the series 2, 4, 6, 10, 28, ?
Correct Answer: (B) 82
The pattern of the series is obtained by adding 2, 2, 4, 18, ... doubling the previous increment and adding 2 .2 + 2 = 44 + 2 = 66 + 4 = 1010 + 18 = 2828 + 54 = 82
Source: PAF Air Force Commission Past Paper
Q123: The shortest distance between two points is called?
Correct Answer: (C) Displacement
The shortest distance between two points is called displacement.Displacement is a measure of the straight-line distance between two points. It is a vector quantity.Key Point: The longest distance between two points is called the circumference if the points are on a circle or a diagonal if the points are on a polygon or a rectangle .
Source: PERA Sergeant Past Paper
Q124: A plane mirror forms an image that is ?
Correct Answer: (D) Virtual and Upright
A plane mirror produces a virtual image, meaning it's not a real image that can be projected onto a screen.The image is also upright, meaning it's not inverted or flipped.
Source: PAF Air Force Commission Past Paper
Q125: Power is the dot product of?
Correct Answer: (C) Force and velocity
Power = Force • Velocity dot product , This gives instantaneous power, measuring how much work is done per unit time.
Source: PAF Air Force Commission Past Paper
Q126: What number in the series 34, 24, 16, 10, 6 ?
Correct Answer: (B) 4
34, 24, 16, 10, 6Find the differences between consecutive terms:- 34 → 24 −10 - 24 → 16 −8 - 16 → 10 −6 - 10 → 6 −4 You can see a decreasing pattern in differences: −10, −8, −6, −4So the next difference should be: −26 − 2 = 4
Source: PAF Air Force Commission Past Paper
Q127: Muslim League was founded in which year?
Correct Answer: (B) 1906
The All India Muslim League was founded on 30 December 1906 in Dacca, British India now Dhaka, Bangladesh .It's founder was Nawab Khwaja Salimullah.It's first President was Sir Agha Khan.The headquarters of the All India Muslim League was in Lucknow.The party was dissolved on 14 August 1947.When the Muslim League ended in 1947, it split into three parties:Muslim League in PakistanAwami League in BangladeshIndian Union Muslim League in India
Source: PAF Air Force Commission Past Paper
Q128: Choose the correct substitute word/sentence: A game which no one is win?
Correct Answer: (A) Draw
A specific condition for any game in which neither party wins is indeed referred to as a Draw or a Tie. This means that both competitors or teams end the game with the same score or an indistinguishable result, Resulting in no clear winner or loser.
Source: PAF Air Force Commission Past Paper
Q129: The turning effect of force is called ?
Correct Answer: (C) Torque
Turning effect of force is called torqueTorque is used to measure coupling while the moment is not.Both torque and moment have the Newton meter as the SI unit; torque is presented as Nm/revolution while moment is presented as Nm.Moment is a static force while torque is a movement force.
Source: PAF Air Force Commission Past Paper
Q130: Which one of the following units represents the largest amount of energy?
Correct Answer: (B) Calorie
Calorie is a larger unit of energy.1 Calorie ≈ 4.184 Joules.1 Joule = 10⁷ Ergs.1 Electron Volt eV = 1.602 × 10⁻¹⁹ Joules.Calorie is commonly used to measure energy in food and metabolic processes.
Source: PAF Air Force Commission Past Paper
Q131: Buffer is a solution which?
Correct Answer: (B) Resist change in its pH
A buffer is a solution that resists change in its pH. A buffer solution is composed of a weak acid and its conjugate base or a weak base and its conjugate acid . When a small amount of a strong acid or base is added to a buffer, The added ions react with the components of the buffer to maintain a relatively constant pH.
Source: PAF Air Force Commission Past Paper
Q132: Where is the French Beach located?
Correct Answer: (A) Karachi
French Beach of Karachi is located halfway between Hawkes Bay and Paradise Point, Karachi It is known to the locals as Haji Ismill Goth. It is reported that the beach got its name from a French couple, who visited the beach sometime during the 1900s,
Source: PAF Air Force Commission Past Paper
Q133: When sound waves move from one medium to another the quantity which remains the same is?
Correct Answer: (B) Frequency
When a sound wave moves from one medium to another, the quantity that remains the same is its frequency. The frequency of a sound wave is determined by the source of the sound and doesn't change when it enters a different medium. However, the wavelength and speed of the wave can change depending on the properties of the new medium.
Source: PAF Air Force Commission Past Paper
Q134: A mass accelerates uniformly when the resultant force acting on it ?
Correct Answer: (B) Is constant but not zero
According to Newton's second law, F=ma, a constant non-zero force results in uniform acceleration of the mass.
Source: PAF Air Force Commission Past Paper
Q135: The value of Boltzmann's constant is ?
Correct Answer: (B) 1.38 × 10−²³ J/K
Boltzmann's constant k_B is a fundamental constant in physics.The value of Boltzmann's constant is 1.38 × 10^ -23 J/K.
Source: PAF Air Force Commission Past Paper
Q136: Limestone is not a ?
Correct Answer: (D) Metamorphic Rock
Limestone is a Sedimentary Rock, Stratified Rock, Aqueous Rock.Limestone consists of calcium carbonate,Which has the chemical formula CaCO3.Calcium carbonate is a chemical compoundIt is a common substance found in rocks as the minerals calciteRK11-12-22
Source: PAF Air Force Commission Past Paper
Q137: The rate of flow of charge at certain point is called ?
Correct Answer: (B) Electric Current
The rate of flow of charge at a certain point is called the Electric Current.- Formula: I = Q / t, where - I = current in amperes , - Q = charge in coulombs , - t = time in seconds . - Measured in Amperes A . - Direction of current is taken as the direction of flow of positive charges conventional current .
Source: PAF Air Force Commission Past Paper
Q138: Law states that at constant temperature for a fixed mass, the absolute pressure and the volume of a gas are inversely proportional.
Correct Answer: (A) Boyle’s Law
- Boyle’s Law: P ∝ 1/V at constant temperature → When pressure increases, volume decreases, and vice versa. - Applies to gases with constant temperature and fixed mass. - Used in understanding gas compression, breathing, and syringe function.
Source: PAF Air Force Commission Past Paper
Q139: Magnetic lines of force always form ?
Correct Answer: (C) Closed loop
Magnetic lines of force always form closed loops from the north pole to the south pole outside the magnet and continue inside the magnet.They never start or end abruptly like electric field lines.
Source: PAF Air Force Commission Past Paper
Q140: The ratio of output to input is called?
Correct Answer: (D) Efficiency
Efficiency is the ratio of output to input, often expressed as a percentage.It represents how much of the input energy is actually converted into useful output energy, with the rest being lost as waste or heat.Key Points:Energy is the ability to do work.Work is the transfer of energy through a force applied over a distance.Power is the rate at which work is done or energy is transferred.
Source: PAF Air Force Commission Past Paper
Q141: The value of 'g' at the equator is ?
Correct Answer: (A) Smaller than at poles
The Earth bulges at the equator and rotates, creating a centrifugal force that slightly reduces gravity there.At the poles, this effect is minimal, so ‘g’ is stronger at the poles than at the equator.
Source: PAF Air Force Commission Past Paper
Q142: The time period of a simple pendulum is independent of its ?
Correct Answer: (A) Mass
The time period T of a simple pendulum is given by: T = 2π√L/gIt depends on length L and acceleration due to gravity g , but is independent of mass.
Source: PAF Air Force Commission Past Paper
Q143: Mercury flows on a surface due to?
Correct Answer: (C) High cohesion
- Mercury has high cohesion strong attraction between its own molecules . - Mercury has low adhesion with most surfaces weak attraction to other materials . - Due to high cohesion and low adhesion, mercury forms rounded droplets and does not spread out like water. - This behavior causes mercury to flow as droplets rather than wetting the surface. - Mercury’s surface tension is very high, making it behave differently than most liquids.
Source: PAF Air Force Commission Past Paper
Q144: When a forward bias is applied to a p-n junction, the concentration of electrons on the p side?
Correct Answer: (A) Increases slightly
When a forward bias is applied to a p-n junction:The potential barrier decreases.Electrons from the n-side move toward the p-side.These electrons are minority carriers on the p-side.As a result, the concentration of electrons on the p-side increases, but only slightly, since it's still a small number compared to the holes which are majority carriers on the p-side .
Source: PAF Air Force Commission Past Paper
Q145: Ground water is called :?
Correct Answer: (A) Water under the Surface of Earth
Water is present beneath the Earth's surface in soil pore spaces and rock formations. - Source: Comes from rainwater, rivers, and lakes that seep into the ground. - Storage: Stored in aquifers permeable rock layers . - Uses: Drinking water, irrigation, and industrial use. - Movement: Moves slowly through soil and rocks due to gravity and pressure. - Recharge: Replenished by rainfall and surface water infiltration. - Importance: Major source of fresh water, especially in dry areas. - Contamination: Can be polluted by chemicals, waste, affecting health.
Source: PAF Air Force Commission Past Paper
Q146: Turbulent flow occurs when the Reynolds number is above ?
Correct Answer: (D) 4000
For flow in a circular pipe, turbulent flow occurs when the Reynolds number is above 4,000Reynolds number Re determines the type of flow:Re < 2000 → Laminar flow2000 < Re < 4000 → Transitional flowRe > 4000 - 5000 → Turbulent flowFor most practical cases, turbulence begins around Re = 5000.
Source: PAF Air Force Commission Past Paper
Q147: Freezing point of mercury is?
Correct Answer: (A) -39C
Freezing point of mercury is -38.83C.The boiling point of Mercury is 356.7 °C.Mercury is a chemical elementIt is commonly known as quicksilver. It is the only metal to remain in liquid form at room temperature.Droplets of liquid mercury are shiny and silver-white with a high surface tension, appearing rounded when on flat surfacesSymbol: HgAtomic number: 80CAS ID: 7439-97-6Atomic mass: 200.59 u
Source: PAF Air Force Commission Past Paper
Q148: Planet Mercury completes one rotation around the sun in how many days?
Correct Answer: (D) 88
It takes Mercury approximately 88 Earth days specifically 87.97 days to complete one orbit around the SunThis means that Mercury's year is equal to 88 Earth daysDistance: Approx. 58 million km from the SunBut its rotation takes nearly 59 days. Speed: ~47 km/sLast updated question 2 May 2026 by NS
Source: PAF Air Force Commission Past Paper
Q149: The melting point of mercury is ?
Correct Answer: (A) -39°C
Mercury is a chemical element It is commonly known as quicksilver. It is the only metal to remain in liquid form at room temperature. Droplets of liquid mercury are shiny and silver-white with a high surface tension, appearing rounded when on flat surfacesSymbol: HgAtomic number: 80Melting point: -38.83 °CBoiling point: 356.7 °CCAS ID: 7439-97-6Atomic mass: 200.59 u
Source: PAF Air Force Commission Past Paper
Q150: In which year Pakistan won the T-20 World Cup?
Correct Answer: (A) 2009
Pakistan won the T-20 World Cup in 2009Edition: SecondHosted by: EnglandHeld: 5 June - 21 June 2009Winner: PakistanPakistan won for the first timeRunner-up: Sri LankaMost wickets taken by: Umar Gul 13 wickets Pakistani captain: Younas Khan
Source: PAF Air Force Commission Past Paper
Q151: An example of ionic compound is ?
Correct Answer: (D) NaCl
NaCl is a classic example of an ionic compoundWhere sodium Na loses an electron to become a positively charged ion cation ,And chlorine Cl gains an electron to become a negatively charged ion an anion .Formula: NaClMolar mass: 58.44 g/molIUPAC ID: Sodium chlorideMelting point: 801 °CSoluble in: Water, Ammonia, Ethanol, Glycerol, Methanol, Propylene glycol, Formic acid, FormamideClassification: SaltBoiling point: 1,465 °C
Source: PAF Air Force Commission Past Paper
Q152: What is the cross product of vectors 1, 0 and 0, -1 ?
Correct Answer: (B) -1
- Cross product formula: a, b × c, d = ad - bc since 2D vectors give a scalar representing the magnitude and direction along the z-axis - Calculation: 1 -1 - 0 0 = -1 - 0 = -1
Source: PAF Air Force Commission Past Paper
Q153: If an object is dropped from a height, its initial velocity will be?
Correct Answer: (A) Zero
When an object is dropped from rest not thrown , its initial velocity is zero.- Initial velocity u = 0 m/s - Acceleration a = +9.8 m/s² downward - Motion: Uniformly accelerated motion - Applicable equation: v = u + at s = ut + ½at²
Source: PAF Air Force Commission Past Paper
Q154: The maximum height in projectile motion is achieved at which angle?
Correct Answer: (C) 90 degrees
Maximum height depends on the vertical component of velocity u·sinθ .- The greater the vertical component, the higher the projectile goes.- sin 90° = 1, which is the maximum value possible.So: - Angle = 90° gives maximum height. - But for maximum range, the angle is 45°.
Source: PAF Air Force Commission Past Paper
Q155: People are finding friends ?the internet.
Correct Answer: (C) On
People are finding friends on the internetلوگ انٹرنیٹ پر دوست ڈھونڈ رہے ہیں۔We say "on the internet" to describe activities done using or through the internet.on → prepositionthe internet → object of the preposition
Source: PAF Air Force Commission Past Paper
Q156: ?gives good advice.
Correct Answer: (C) Sentence
A sentence gives good advice.A sentence is a group of words that expresses a complete thought - like giving advice. - An idiom is a fixed phrase with a figurative meaning. - A word alone usually isn't enough to give full advice.
Source: PAF Air Force Commission Past Paper
Q157: The boss sits ?the chair.
Correct Answer: (C) On
The boss sits on the chair.باس کرسی پر بیٹھتا ہےPreposition is "on""On" shows the position on a surface
Source: PAF Air Force Commission Past Paper
Q158: MI-5 is the intelligence agency of which country?
Correct Answer: (B) United Kingdom
MI-5 is the United Kingdom's domestic counter-intelligenceMI5 stands for Military Intelligence, Section 5Mi5 is also known as the Security ServiceIt was Formed on 7 October 1909 as the Secret Service Bureau Its Headquarters is located in Thames House, London, United Kingdom
Source: PPSC Junior Patrol Officer JPO Past Paper
Q159: A student consistently reports 0.2 ml less than the actual value. This is an example of?
Correct Answer: (C) Systematic error
A consistent and repeatable error caused by a flaw in equipment, technique, or experimental setup.- Examples: - A faulty weighing scale always giving 0.2g extra. - Burette readings always off by 0.2 mL. - Incorrect calibration of instruments.
Source: PAF Air Force Commission Past Paper
Q160: The pH of 0.01 M HCl is?
Correct Answer: (B) 2
Formula: pH = -log H⁺ H⁺ = 0.01 = 10⁻² pH = -log 10⁻² = 2
Source: PAF Air Force Commission Past Paper
Q161: Number of molecules in 0.5 moles of CO₂ is?
Correct Answer: (B) 3.011 × 10²³
Number of molecules = moles × Avogadro’s number = 0.5 × 6.022 × 10²³ = 3.011 × 10²³ molecules
Source: PAF Air Force Commission Past Paper
Q162: A device used to measure potential difference is called ?
Correct Answer: (C) Voltmeter
- A voltmeter measures the potential difference voltage between two points in a circuit. - It is always connected in parallel to the component. - The SI unit of potential difference is the Volt V . - Potential difference is the work done per unit charge to move a charge between two points. - Formula: V = W / Q - V = potential difference volts - W = work done joules - Q = charge coulombs - A voltmeter has high resistance so it doesn't draw current from the circuit.
Source: PAF Air Force Commission Past Paper
Q163: Which day is known as leap day or leap year day?
Correct Answer: (A) Feb-29
A year may be a leap year if it is evenly divisible by 4.The Solar year is 365.2422 days long, a length which no calendar year can accommodate.Generally, a leap year happens every four yearsThe next leap day will be on Thursday, February 29, 2024.4323
Source: PAF Air Force Commission Past Paper
Q164: The value of the eccentricity of a circle is?
Correct Answer: (A) 0
The value of eccentricity of a circle is 0. This is because a circle is a special case of an ellipse where the two foci coincide at the single center point, resulting in a zero distance between the fociAs a measure of how much a shape deviates from a perfect circle, a circle, by its very nature, deviates from a circle by zero amount.
Source: PAF Air Force Commission Past Paper
Q165: The ?has the greatest intermolecular forces?
Correct Answer: (A) Solid
- In solids, molecules are tightly packed and held by strong intermolecular forces, giving solids a definite shape and volume. - Gases have the weakest intermolecular forces.
Source: PAF Air Force Commission Past Paper
Q166: How many types of concave lens are there?
Correct Answer: (C) Three
Three types of concave lenses:1. Bi-concave Lens: This lens has two surfaces that are curved inward, resembling a double concave shape. It is the most common type of concave lens and diverges light rays symmetrically from both sides. 2. Plano-concave Lens: This lens features one flat surface and one concave surface. The flat side is known as a "plano" surface. 3. Convexo-Concave Lens:Also called a menisco-concave lens, this type has one convex outward-curving surface and one concave inward-curving surface. For it to be a concave lens, the concave surface must have a greater curvature than the
Source: PAF Air Force Commission Past Paper
Q167: The lever kind of human arm is?
Correct Answer: (D) None of these
The human arm acts as a third-class lever, where the effort is applied between the fulcrum elbow and the load hand . For example, the forearm is a 3rd class lever because the biceps pulls on the forearm between the joint fulcrum and the ball load . Using the standard terminology of levers, the forearm is the lever, the biceps tension is the effort, the elbow joint is the fulcrum, and the ball weight is the resistance.
Source: PAF Air Force Commission Past Paper
Q168: In the central nervous system, myelinated axons form the ?matter.
Correct Answer: (B) White
In the central nervous system, myelinated axons form the white matter.Composition: Primarily bundles of myelinated axons. Function: To transmit signals rapidly and efficiently between different areas of the central nervous system. Color: The lipid content of the myelin sheath gives the tissue a whitish appearance. Location: Found in the deeper tissues of the brain subcortical and surrounds the centrally located gray matter of the spinal cord.
Source: PAF Air Force Commission Past Paper
Q169: The study of the nervous system and it's disorder is called ?
Correct Answer: (B) Neurology
The study of the nervous system and its disorders is called neurology.Neurologists diagnose and treat conditions related to the brain, spinal cord, and nerves.
Source: PAF Air Force Commission Past Paper
Q170: The function of oesophagus in digestive system is to ?
Correct Answer: (C) Pass the food to the Stomach
The oesophagus is a muscular tube that connects the pharynx throat to the stomach.Its main function is to transport food from the pharynx to the stomach through peristalsis wave-like muscle contractions .
Source: PAF Air Force Commission Past Paper
Q171: All of the following are parts of the digestive system except?
Correct Answer: (B) Heart
The heart is part of the circulatory system, not the digestive system.The stomach, small intestine, and large intestine are all key parts of the digestive system.
Source: PAF Air Force Commission Past Paper
Q172: Small food molecules after digestion pass from digestive system to blood by which one of the following process?
Correct Answer: (B) Absorption
Absorption is the process where small digested food molecules pass through the walls of the intestine into the bloodstream.This allows nutrients to be transported to cells throughout the body for energy and growth.
Source: PAF Air Force Commission Past Paper
Q173: Digestive system in animals start from?
Correct Answer: (C) Endoderm
The digestive system in animals develops primarily from the endoderm, with contributions from the mesoderm for certain structures. The ectoderm plays a role in the development of the mouth and anus.
Source: PAF Air Force Commission Past Paper
Q174: Antonym of Composed is?
Correct Answer: (A) Nervous
Composed : پُرسکون، متوازن، سنبھلا ہوا Nervous : گھبرایا ہوا، پریشان، بے چین
Source: PAF Air Force Commission Past Paper
Q175: Brevity is the ?of wit.
Correct Answer: (C) Soul
This is a famous quote by William Shakespeare: "Brevity is the soul of wit."- Brevity means being short and concise. - Wit means cleverness or intelligence in expression. - So, the quote means: Being brief is the essence soul of being clever.
Source: PAF Air Force Commission Past Paper
Q176: If 20 students of class 10 speak Urdu, 33 speak Sindhi only and 13 can speak both, how many students can speak only Sindhi?
Correct Answer: (B) 33
The question already states: - 33 students speak Sindhi only not both . - So, there's no need to subtract anything.
Source: PAF Air Force Commission Past Paper
Q177: The Jar was full ?oil.
Correct Answer: (D) Of
Full of something means کسی چیز سے بھرا ہواWe use "full of" to describe something that is filled with something else."The jar was full of oil" full of + noun = containing that thing to capacity.
Source: PAF Air Force Commission Past Paper
Q178: Which country left the Kyoto Protocol?
Correct Answer: (A) Canada
Canada's withdrawal from the Kyoto Protocol. This action became effective for Canada on 15 December 2012.***The Kyoto Protocol was an international treaty that talked about Pollution and aimed to reduce the emission of gases that contribute to global warmingKyoto Protocol on International Climate Change signed: December 1997The Kyoto Protocol was signed in Kyoto, JapanCome into Force on 16 Feb 2005The Kyoto Protocol was an international treaty that extended the 1992 United Nations FrameworkParties: the European UnionCook IslandsNiueall UN member states except Andorra, Canada, South Sudan, and
Source: PAF Air Force Commission Past Paper
Q179: In a reversible process, the entropy of the system:?
Correct Answer: (A) Remains constant
In a reversible process, the entropy of the system remains constant. A key characteristic of a reversible process is that it can be reversed without leaving any net change in the system or its surroundings, including the entropy.
Source: PAF Air Force Commission Past Paper
Q180: The entropy of steam is ?than ice.
Correct Answer: (C) Greater
Entropy S is a measure of disorder or randomness in a system.Steam gas has higher entropy than ice solid because:In steam, molecules move freely and randomly.In ice, molecules are tightly packed in an orderly structure.Since gases have more molecular motion and disorder than solids, the entropy of steam is greater than that of ice.
Source: PAF Air Force Commission Past Paper
Q181: In which of the system listed below is the entropy decreasing?
Correct Answer: (A) A gas is cooled
A gas being cooled is a system where entropy is decreasing. When a gas is cooled, its molecules slow down and become more ordered, leading to a decrease in entropy.
Source: PAF Air Force Commission Past Paper
Q182: 1.5% of 100 is?
Correct Answer: (B) 1.5
- Percent means “per hundred”. - 1.5% of 100 = 1.5/100 × 100 = 1.5
Source: PAF Air Force Commission Past Paper
Q183: MIT is located in which country?
Correct Answer: (A) Canada
MIT stands for Massachusetts Institute of Technology. It is a private research university Located in Cambridge, Massachusetts, USA. Motto: Mens et Manus Latin Motto in English: "Mind and Hand"Established: April 10, 1861Founder: William Barton Rogers
Source: PAF Air Force Commission Past Paper
Q184: When an acid reacts with an alkali, the reaction is called?
Correct Answer: (C) Neutralization reaction
Acid reacts with alkali → Neutralization Reaction - Acid + Base alkali → Salt + Water - Example: HCl + NaOH → NaCl + H₂O - It’s an exothermic reaction releases heat .
Source: PAF Air Force Commission Past Paper
Q185: Tannic acid is commonly found in?
Correct Answer: (B) Plant materials
Tannic acid is found in plant materialsIt is a type of tannin a polyphenol Beverages: Tea, coffee, and wine are common sources. Fruits: Berries like cranberries and blueberries, as well as grapes, apricots, and peaches. Nuts: Some acorns, hazelnuts, walnuts, and almonds contain tannins. Other Foods: Legumes, chocolate, and even spices like cinnamon can contain tannins.
Source: PAF Air Force Commission Past Paper
Q186: Catalyst used to convert SO₂ to SO₃ is?
Correct Answer: (C) Vanadium Pentoxide V₂O₅
. Catalyst to convert SO₂ to SO₃ is Vanadium Pentoxide V₂O₅ - Used in the Contact Process for manufacturing sulfuric acid. - Speeds up the reaction: 2SO₂ + O₂ → 2SO₃
Source: PAF Air Force Commission Past Paper
Q187: If pH = 3, the solution is?
Correct Answer: (D) Strong acid
pH scale: 0 to 14 pH < 7 = AcidicpH > 7 = BasicpH = 7 = Neutral - pH 3 means it’s a strong acid, like HCl or vinegar.
Source: PAF Air Force Commission Past Paper
Q188: Enzymes are special types of ?produced by the body.
Correct Answer: (C) Proteins
Enzymes are special types of proteins produced by the body.They act as catalysts, speeding up chemical reactions in the body without being consumed in the process.
Source: PAF Air Force Commission Past Paper
Q189: Enzymes are ?
Correct Answer: (B) Protein in nature
Enzymes are biological molecules made up of proteins, which catalyze chemical reactions, speeding up metabolic processes in living organisms.Proteins provide the structure and active site for enzymes to bind substrates and facilitate chemical reactions.
Source: PAF Air Force Commission Past Paper
Q190: The teacher is ?the chair.
Correct Answer: (B) On
The teacher is on the chair."On" is used when someone or something is physically resting on a surface, like sitting or standing on a chair."On" = پر / اوپر "On" is a preposition
Source: PAF Air Force Commission Past Paper
Q191: There is a cat ?your chair?
Correct Answer: (A) Under
There is a cat under your chair."Under" shows the position below something - in this case, below the chair.
Source: PAF Air Force Commission Past Paper
Q192: All the bones of the body make the framework called?
Correct Answer: (A) Skeleton
The skeleton is the framework of the body.It is composed of 206 bones that provide support, protection, and movement.It is the structural system that gives the body its shape and allows for various physical activities.
Source: PAF Air Force Commission Past Paper
Q193: The Whatson- Crack Model suggested that DNA replication is?
Correct Answer: (C) Sami-Conservative
The Watson-Crick model suggested that DNA replication is semi-conservative, Meaning that each original DNA strand serves as a template to synthesize a new complementary strand, This results in two DNA molecules, each containing one original strand and one newly synthesized strand.
Source: PAF Air Force Commission Past Paper
Q194: Identify the picture see in detail given below: Nephron, Neuron, Muscle cell, None of these?
Correct Answer: (B) Neuron
A neuron is the basic structural and functional unit of the nervous systemIt often shown with a long axon, dendrites, and cell body.It transmits electrical impulses in the body.
Source: PAF Air Force Commission Past Paper
Q195: The peripheral nervous system consists of ?pairs of cranial nerves, which emerge from the brain and mainly serve the head and neck.
Correct Answer: (A) 12
The peripheral nervous system PNS includes 12 pairs of cranial nerves that originate from the brain.These nerves primarily control functions of the head, neck, and some internal organs like the heart and lungs.
Source: PAF Air Force Commission Past Paper
Q196: The Central Nervous System CNS is composed of ?
Correct Answer: (A) Brain, Spinal Cord
The Central Nervous System CNS comprises the:These two structures are the core of the nervous system, The brain controls how we think, learn, move, and feel. The spinal cord carries messages back and forth between the brain and the nerves that run throughout the body..
Source: PAF Air Force Commission Past Paper
Q197: Octopuses have not only large brains ?also a well-developed nervous system.
Correct Answer: (B) But also
Octopuses have not only large brains but also a well-developed nervous systemThe correct correlative conjunction pair is "not only... but also...".
Source: PAF Air Force Commission Past Paper
Q198: She ?both German and Italian.
Correct Answer: (C) Speaks
She speaks both German and Italian.وہ جرمن اور اطالوی دونوں بولتی ہے۔Subject “She” is singular, so we use "speaks" present simple, third person singular .
Source: PAF Air Force Commission Past Paper
Q199: In a storm, two trees ?down.
Correct Answer: (C) Were blown
In a storm, two trees were blown down.طوفان میں دو درخت اکھڑ گئے۔The sentence is passive: trees object + be verb + past participle.Pattern: was/were + past participleblow → blown past participle .So:Plural: Two trees were blown down.
Source: PAF Air Force Commission Past Paper
Q200: ?I was watching TV, I went to bed.
Correct Answer: (C) After
After I was watching TV, I went to bed.میں ٹی وی دیکھنے کے بعد، میں بستر پر چلا گیا.After → After I was watching TV, I went to bed correct meaning: first watched TV, then went to bed .
Source: PAF Air Force Commission Past Paper
Q201: Tourists came ?boat.
Correct Answer: (A) By
Tourists came by boat.سیاح کشتیوں کے ذریعے آتے تھے۔"By" Preposition It is used to indicate the means of transport
Source: PAF Air Force Commission Past Paper
Q202: A car covers 2 km using 15 liters of fuel. Fuel costs Rs. 90 per liter. How much distance can the car cover for Rs. 450?
Correct Answer: (D) 655 km
1. Fuel for Rs. 450 = 450 ÷ 90 = 5 liters2. Distance per 15 liters = 2 km → Distance per 1 liter = 2 ÷ 15 = 0.133 km3. Distance for 5 liters = 0.133 × 5 = 0.665 km4. Convert to meters: 0.665 km = 665 meters
Source: PAF Air Force Commission Past Paper
Q203: He acts ?an undertaker.
Correct Answer: (C) As
He acts as an undertakerوہ ایک ذمہ دار کے طور پر کام کرتا ہے۔ As → “acts as an undertaker” means he takes the role or duty of an undertaker he is functioning in that capacity .
Source: PAF Air Force Commission Past Paper
Q204: Alas! He is ?
Correct Answer: (B) Upset
Alas! He is upset.کاش! وہ پریشان ہے۔The word “Alas!” expresses sorrow, regret, or disappointment - never happiness. Upset → correct, since "Alas!" fits with sadness or being upset.
Source: PAF Air Force Commission Past Paper
Q205: Farmers use a tractor ?in the field.
Correct Answer: (B) To plough
Farmers use a tractor to plough in the field.کسان کھیت میں ہل چلانے کے لیے ٹریکٹر کا استعمال کرتے ہیں۔To plough → correct, because "use a tractor to plough in the field" makes sense infinitive of purpose .
Source: PAF Air Force Commission Past Paper
Q206: What comes next in the series? 100, 98, 94, 88, 80, 70, ?
Correct Answer: (A) 58
- 100 → 98 -2 - 98 → 94 -4 - 94 → 88 -6 - 88 → 80 -8 - 80 → 70 -10 Following the same pattern: 70 - 12 = 58
Source: PAF Air Force Commission Past Paper
Q207: The process of maintaining internal body temperature regardless of external environment is called?
Correct Answer: (B) Thermoregulation
The process of maintaining a stable internal body temperature despite external environmental changes is called thermoregulation. This is a vital part of homeostasis, a state where an organism maintains stable internal conditions for proper physiological function. The process is controlled by the hypothalamus in the brainWhich receives temperature information from thermoreceptors and activates various mechanisms, Like shivering for heat generation or sweating for heat loss, to bring the body back to its normal temperature range.
Source: PAF Air Force Commission Past Paper
Q208: Gloves: Hands?
Correct Answer: (C) Socks:Feet
As Glove is worn in Hands Similarly Socks are worn on feet.
Source: PAF Air Force Commission Past Paper
Q209: HAND : GLOVES :: ?
Correct Answer: (A) Legs : shoes
Just as gloves are worn on hands, shoes are worn on legs specifically feet .This is a relationship of covering or wearing.Last updated on 22-07-2026 by NA
Source: PAF Air Force Commission Past Paper
Q210: My cousin is ?doctor.While my brother is ?author.
Correct Answer: (A) a/an
My cousin is a doctor.While my brother is an author."A/an" is used to refer to a non-specific or non-particular member of the group.
Source: PAF Air Force Commission Past Paper
Q211: Mechanical waves are?
Correct Answer: (C) Transverse and Longitudinal
Mechanical waves require a medium to travel and can be: - Transverse e.g., water waves - Longitudinal e.g., sound waves
Source: PAF Air Force Commission Past Paper
Q212: If a cork is thrown in vibrating water, it will?
Correct Answer: (C) Stay in place and move up and down
Water waves are transverse mechanical waves. The cork floats and oscillates vertically up and down but doesn't move forward with the wave - showing that energy moves, not matter.
Source: PAF Air Force Commission Past Paper
Q213: Bloons flies in air, its reason is ?
Correct Answer: (B) low density
Bloons fly in the air, the reason is low-density*****Balloons that float are typically filled with helium gas, Helium gas is less dense than the gas in our air. When the air inside the balloon is heated, the molecules in the air begin to move around and spread out,The air in balloon becomes less dense.
Source: PAF Air Force Commission Past Paper
Q214: Photosynthesis occurs during day time because it depends on?
Correct Answer: (B) Sunlight
Photosynthesis occurs during daytime because it depends on sunlight, which provides the energy necessary for the process to occur.Sunlight is the source of light energy that is absorbed by pigments such as chlorophyll.Which is then used to power the conversion of carbon dioxide and water into glucose and oxygen.
Source: PAF Air Force Commission Past Paper
Q215: Photosynthesis occurs in ?
Correct Answer: (C) Chloroplast
Photosynthesis occurs in the chloroplast, an organelle in plant cells containing chlorophyll.It captures sunlight to produce food through the conversion of carbon dioxide and water.
Source: PAF Air Force Commission Past Paper
Q216: How many primary colors are there ?
Correct Answer: (B) 3
Three Primary Colors : Red, Yellow, Blue.Three Secondary Colors : Orange, Green, Violet.Six Tertiary Colors : Red-Orange, Yellow-Orange, Yellow-Green, Blue-Green, Blue-Violet, Red-Violet, which are formed by mixing a primary with a secondary.
Source: PAF Air Force Commission Past Paper
Q217: Enzymes show optimum activity between 37 C to 50 C however works:?
Correct Answer: (C) It loses activity permanently above 50 C
If the temperature increases from 37 degrees Celsius to 50 degrees Celsius, the enzyme activity will decrease. enzymes are proteins, they are denatured by heat. Therefore, at higher temperatures over about 55°C in the graph below there is a rapid loss of activity as the protein suffers irreversible denaturation.
Source: PAF Air Force Commission Past Paper
Q218: A restoring force in oscillatory motion always?
Correct Answer: (B) Acts toward the mean position
A restoring force is the force that brings the object back to its equilibrium mean position during oscillatory motion, like in a spring or pendulum. It is responsible for the repetitive back-and-forth motion.
Source: PAF Air Force Commission Past Paper
Q219: The SI unit of potential difference is?
Correct Answer: (D) Volt
- Potential difference V is the work done per unit charge to move a charge between two points. - Formula: V = W/Q where W = work in joules, Q = charge in coulombs - 1 Volt = 1 Joule / 1 Coulomb - It tells us how much energy is used to move electric charges through a circuit.
Source: PAF Air Force Commission Past Paper
Q220: A hydraulic press works on the principle of?
Correct Answer: (C) Pascal's Law
Pascal's Law states that pressure applied to a confined fluid is transmitted equally in all directions. A hydraulic press uses this principle to multiply force, allowing a small input force to generate a much larger output force.
Source: PAF Air Force Commission Past Paper
Q221: Sound waves require a ?for their propagation?
Correct Answer: (C) Medium
- Sound waves are mechanical waves, meaning they need particles to transfer energy. - In a vacuum, there are no particles, so sound cannot travel. - Therefore, a medium solid, liquid, or gas is essential for sound propagation.
Source: PAF Air Force Commission Past Paper
Q222: If the focal length f of a spherical mirror is negative, the mirror is?
Correct Answer: (A) Concave mirror
A spherical mirror with a negative focal length is a concave mirror. Concave mirrors converge light rays, and their focal point is located in front of the mirror.This results in a negative focal length. Convex mirrors, on the other hand, diverge light rays and have a positive focal length. Plane mirrors have no curvature and therefore no focal point. Cylindrical mirrors focus light into a line rather than a point, and are not considered in this context.
Source: PAF Air Force Commission Past Paper
Q223: Which of the following always forms a virtual, erect, and diminished image due to its negative focal length?
Correct Answer: (C) Convex mirror
A convex mirror always forms a virtual, erect, and diminished image regardless of the object's position. This is because the light rays diverge when reflected from its curved surface. The virtual image appears behind the mirror and is smaller than the object.
Source: PAF Air Force Commission Past Paper
Q224: The image formed by a plane mirror is ?in size to the object.
Correct Answer: (D) Same
A plane mirror produces an image that is the same size as the object.The mirror doesn't magnify or reduce the image, it simply reflects it.
Source: PAF Air Force Commission Past Paper
Q225: A process in which liquid changes into gas without boiling is called?
Correct Answer: (D) Evaporation
Evaporation is the process where liquid turns into gas at temperatures below its boiling point.It occurs at the surface of the liquid.It is influenced by factors like temperature and surface area.
Source: PAF Air Force Commission Past Paper
Q226: Liquids have?
Correct Answer: (C) Definite volume, no definite shape
Liquids take the shape of their container, meaning they have no definite shape, but they maintain a constant volume regardless of the container they are in.
Source: PAF Air Force Commission Past Paper
Q227: Sound waves in the air?
Correct Answer: (C) Longitudinal waves
Sound waves in air are longitudinal waves Because particles of the medium through which the sound is transported vibrate parallel to the direction that the sound wave moves.
Source: PAF Air Force Commission Past Paper
Q228: If input of a NOT gate is "1" then its output is ?
Correct Answer: (B) 0
A NOT gate, also known as an inverter.It is a digital logic gate that negates the input signal.If the input is "1", the output will be "0".If the input is "0", the output will be "1".The truth table for a NOT gate is:Input | Output-----|------0 | 11 | 0
Source: PAF Air Force Commission Past Paper
Q229: Which of the following performs its function by converting electrical energy into motion?
Correct Answer: (A) An electric motor
An electric motor converts electrical energy into mechanical energy, producing motion or rotation.It uses electromagnetic forces to generate torque, which drives a shaft or other mechanical components.
Source: PAF Air Force Commission Past Paper
Q230: The principle of an electric generator is based on ?
Correct Answer: (A) Faraday's law
An electric generator works on the principle of electromagnetic induction.Faraday's law states that a changing magnetic flux induces an emf, which is the working principle of generators.
Source: PAF Air Force Commission Past Paper
Q231: The working principle of a Transformer is?
Correct Answer: (A) Electrostatic induction
Transformer works on Faraday's law of mutual induction. Faraday's law of electromagnetic induction states that, "When a change takes place in the magnetic flux which is linked with a circuit, an electromotive force current will induce in the circuit"***Transformers are used to change AC voltage levelsThe transformer work only on an AC supplyND11-4-2023
Source: PAF Air Force Commission Past Paper
Q232: The conversion of electrical energy into chemical energy is observed in?
Correct Answer: (B) Storage battery
A battery is a device that can store:electrical energy in the form of chemical energy,and convert that energy into electricityHowever, when a storage battery is being used in UPS it needs charging. At the time of charging the conversion of electrical energy into chemical energy is observed.
Source: PPSC Junior Patrol Officer JPO Past Paper
Q233: In Ampere's law, the integration is over a ?
Correct Answer: (B) Closed path
Ampere's law states that the line integral of the magnetic field around a closed path is proportional to the total current enclosed.Mathematically, ∮B⋅dl=μ0Iencoint mathbf B cdot dmathbf l = mu_0 I_ text enc ​, where the integral is taken over a closed loop path .
Source: PAF Air Force Commission Past Paper
Q234: Oxygen is prepared in laboratory from KClO₃ in the presence of ?
Correct Answer: (C) MnO2
In the lab, oxygen gas is prepared by heating potassium chlorate KClO₃ in the presence of manganese dioxide MnO₂ as a catalyst.MnO₂ speeds up the decomposition of KClO₃ without being consumed.
Source: PAF Air Force Commission Past Paper
Q235: What happens to the phase of a wave when it travels from a denser medium to a rarer medium?
Correct Answer: (C) No phase change
- When a wave travels from denser to rarer medium, no phase change occurs. - Phase change of 180° or π radians occurs only when a wave reflects from a denser medium.
Source: PAF Air Force Commission Past Paper
Q236: If the angle between the vector area and the electric field is 30∘, then the flux will be maximum when?
Correct Answer: (A) √3/2
If the angle between the vector area and the electric field is 30∘, then the flux will be maximum when √3/2.
Source: PAF Air Force Commission Past Paper
Q237: The value of maximum electric flux is obtained when angle between E and A is ?
Correct Answer: (A) 0°
Electric flux Φ is maximum when E and A are parallel, i.e., angle = 0°.Formula: Φ = E·A·cosθ → cos 0° = 1 gives maximum flux.
Source: PAF Air Force Commission Past Paper
Q238: The distance between the optical center and the principal focus is called ?
Correct Answer: (A) Focal Length
Focal length is the distance between the optical center of a lens or mirror and its principal focus.It determines how strongly the lens or mirror converges or diverges light.
Source: PAF Air Force Commission Past Paper
Q239: Concave lenses are also known as ?
Correct Answer: (B) Diverging Lens
Concave lenses are also known as diverging lenses. Shape: Thinner in the middle and thicker at the edges.Image: They produce smaller, upright, virtual images.Use: Often used in eyeglasses to correct myopia nearsightedness . Last updated on 09-03-2026
Source: PAF Air Force Commission Past Paper
Q240: The initial setting time of Hydraulic Lime is?
Correct Answer: (D) 120 minutes
Verified past paper answer key.
Source: PAF Air Force Commission Past Paper
Q241: Which one of the following is an insulator for electricity but a conductor for heat?
Correct Answer: (B) Diamond
Diamond is an excellent conductor of heat due to strong covalent bonding and crystal structure.It is a strong electrical insulator because it lacks free electrons to carry current.
Source: PAF Air Force Commission Past Paper
Q242: Which hydraulic structure is designed to raise or lower boats between water levels in a canal or river?
Correct Answer: (A) Lock
Canal Lock: A hydraulic structure used to raise or lower boats between different water levels.It works like a water elevator.It has a closed chamber and gates.The chamber is filled or emptied with water to move boats.
Source: PAF Air Force Commission Past Paper
Q243: Which of the following gives correct equation for Hooke's law for the spring? F is force, k is spring constant and x is extension/compression in spring ?
Correct Answer: (D) Fs = -kx
Spring force: In an ideal spring, the force required to stretch a string from its equilibrium position is directly proportional to the extension of the spring.This is known as Hooke's law and commonly written:Fs = -kxWhere Fs is the spring force, x is the displacement from the equilibrium position and k is the spring constant.
Source: PAF Air Force Commission Past Paper
Q244: Brain Drains means ?
Correct Answer: (B) Migration Of Skilled Person To Other Country
Brain Drains means Migration Of Skilled Person To Other Country.برین ڈرینز کا مطلب ہے ہنر مند افراد کی دوسرے ملک میں ہجرت۔
Source: PAF Air Force Commission Past Paper
Q245: To break the ice means what?
Correct Answer: (C) To start a conversation
Idiom "to break the ice", which means to start a conversation or ease tension.It is often used in social or formal situations to make people feel comfortable.
Source: PAF Air Force Commission Past Paper
Q246: In which form of energy is the measure to determine how much energy an object has and in turn how much work can it perform?
Correct Answer: (C) Potential Energy
Potential energy is a measure of the energy an object has due to its position or state, and it determines how much work the object can perform.The amount of potential energy an object has is a function of its mass, height, and other factors.It can be converted into kinetic energy the energy of motion when the object is released or moved.For example, a ball at the top of a hill has a certain amount of potential energy due to its height, and as it rolls down the hill, this potential energy is converted into kinetic energy, allowing the ball to perform work such as moving down the hill .
Source: PAF Air Force Commission Past Paper
Q247: Work done is equal to ?
Correct Answer: (C) Effort x distance
Work done is equal to Effort x distance.This is represented mathematically as W=F⋅d, where W is work, F is the force or effort , and d is the distance over which the force is applied.
Source: PAF Air Force Commission Past Paper
Q248: In the technical terms, muscle pull is known as ?
Correct Answer: (B) Strain
A strain is when a muscle is stretched too much and part of it tears. It is also called a pulled muscle.
Source: PAF Air Force Commission Past Paper
Q249: What is the value of sin θ × cos 90° ?
Correct Answer: (B) 0
- cos 90° = 0 - So, sin θ × cos 90° = sin θ × 0 = 0
Source: PAF Air Force Commission Past Paper
Q250: If the circumference of a circle is 154, its radius is approximately ?
Correct Answer: (B) 24.5 cm
To find the radius from the circumference of a circle, use the formula:C = 2πr Given: C = 154Step 1: Solve for r r = C / 2π = 154 / 2 × 3.14 = 154 / 6.28 ≈ 24.52
Source: PAF Air Force Commission Past Paper
Q251: If one angle of an isosceles triangle is 68", then possible values of the second angle are?
Correct Answer: (D) 44° or 56°
If one angle of an isosceles triangle is 68°, then:- If 68° is the vertex angle, the other two equal angles = 180 - 68 / 2 = 56° - If 68° is one of the equal base angles, then the vertex angle = 180 - 2×68 = 44°So, possible values for the second angle are 44° or 56°
Source: PAF Air Force Commission Past Paper
Q252: The theorem "In a right-angle triangle, the area of the square of the hypotenuse is equal to the sum of the areas of the squares of the other two sides", was discovered by:?
Correct Answer: (B) Pythagoras
The theorem you mentioned is known as Pythagoras' Theorem, which states: c^2 = a^2 + b^2c2=a^2+b^2 where: cc is the hypotenuse the longest side of a right-angled triangle . aa and bb are the other two sides. It was discovered by the ancient Greek mathematician Pythagoras and is fundamental in geometry.
Source: PAF Air Force Commission Past Paper
Q253: Antonym of import is ?
Correct Answer: (A) Export
Export means to send goods or services out of a country, which is the opposite of Import bringing goods into a country .Import درآمد کرناExport برآمد کرنا۔
Source: PAF Air Force Commission Past Paper
Q254: Synonym of import is?
Correct Answer: (C) Bring in
Import means to bring goods or services into a country from abroad,Import درآمد کرناBring in اندر لاؤ
Source: PAF Air Force Commission Past Paper
Q255: Karachi is a ?populated city.
Correct Answer: (B) Thickly
"Thickly populated" means having a high population density, which correctly describes Karachi.
Source: PAF Air Force Commission Past Paper
Q256: Japan is a ?country.
Correct Answer: (A) Rich
Japan is a rich country.جاپان ایک امیر ملک ہے۔"Rich" is the correct adjective to describe a country with wealth and economic strength.
Source: PAF Air Force Commission Past Paper
Q257: Usman is afraid ?dog.
Correct Answer: (C) Of
Usman is afraid of the dog.Afraid of means خوفزدہ We use "afraid of" to show fear of something
Source: PAF Air Force Commission Past Paper
Q258: My sister is bad ?maths.
Correct Answer: (C) At
My sister is bad at maths.میری بہن ریاضی میں خراب ہے۔At is a preposition.We use "bad at" to describe someone's weakness or lack of skill in a subject or activity.***
Source: PAF Air Force Commission Past Paper
Q259: I have had problems similar ?yours.
Correct Answer: (D) To
I have had problems similar to yours. The phrase "similar to" is used to show resemblance or likeness. So, "problems similar to yours" means problems that resemble yours.ND11-4-2023
Source: PAF Air Force Commission Past Paper
Q260: The shopkeeper has charged me ten rupees ?this book.
Correct Answer: (B) For
The shopkeeper has charged me ten rupees for this bookWe use "for" in this sentence because it shows the purpose or reason for the charge.for" links the amount to the thing or service you are paying for.
Source: PAF Air Force Commission Past Paper
Q261: Nelson Mandela was deprived ?his freedom.
Correct Answer: (D) Of
Nelson Mandela was deprived of his freedom. We use "of" after "deprived" because:The phrase "deprived of" means to be denied or stripped away something. "Of" shows what exactly is being taken away or denied.
Source: PAF Air Force Commission Past Paper
Q262: He is accustomed ?hot weather.
Correct Answer: (B) To
The phrase accustomed ended with “To” and is followed by “ing” form of a verb.Accustomed to something means کسی چیز کا عادی ہوناHe is accustomed to hot weather means وہ گرم موسم کا عادی ہے۔
Source: PAF Air Force Commission Past Paper
Q263: If the focal length f of a mirror is positive, the mirror is?
Correct Answer: (A) Convex
If the focal length f of a mirror is positive, the mirror is a convex mirror. This is because, according to the sign convention for mirrors, The focal point of a convex or diverging mirror is located behind the mirror, This is considered the positive direction, leading to a positive focal length.
Source: PAF Air Force Commission Past Paper
Q264: In mirrors, if image distance q is negative, the image will be?
Correct Answer: (C) Virtual
Negative q means the image forms on the same side as the object - a virtual image.Object Distance p :Typically positive, indicating the object is on the side of the lens/mirror from which light originates. Image Distance q :Positive q: Image forms on the opposite side of the lens/mirror from the object, indicating a real image. Negative q: Image forms on the same side of the lens/mirror as the object, indicating a virtual image.
Source: PAF Air Force Commission Past Paper
Q265: In mirrors, if image distance q is positive, the image will be:?
Correct Answer: (B) Real
Positive q indicates the image is in mirrors. A positive image distance q signifies a real and inverted image located on the same side of the mirror as the object. This means the reflected light rays actually converge at that point, allowing the image to be projected onto a screen. On the same side as the reflected rays - a real image.
Source: PAF Air Force Commission Past Paper
Q266: What is the principal focus of a mirror or lens?
Correct Answer: (C) The point where parallel rays meet or appear to meet after reflection/refraction
The principal focus of a mirror or lens is the point on the principal axis where parallel rays of light either converge Or appear to diverge from after reflection or refraction.For mirrors: - Concave mirror: Rays converge at the focus. - Convex mirror: Rays appear to diverge from the focus.
Source: PAF Air Force Commission Past Paper
Q267: He gave me a cheque ?fifty thousand rupees.
Correct Answer: (A) For
He gave me a cheque for fifty thousand rupees.We use "for" with cheque amounts to indicate the value written on the cheque.
Source: PAF Air Force Commission Past Paper
Q268: I saw ?one rupee note on the road.
Correct Answer: (A) A
Article A is used with singular countable nouns pronounced with consonant sound.
Source: PAF Air Force Commission Past Paper
Q269: Volt is equal to ?
Correct Answer: (C) J/C
Volt V = Joule per Coulomb J/C , meaning it measures the electric potential energy per unit charge.This unit defines how much energy J is given to each Coulomb C of charge in a circuit.
Source: PAF Air Force Commission Past Paper
Q270: 01 V is equal to?
Correct Answer: (A) 1 J C^-1
1 Volt V is equal to 1 Joule per Coulomb JC^-1 .
Source: PAF Air Force Commission Past Paper
Q271: Unit of angular acceleration is?
Correct Answer: (A) rad/s²
The unit of angular acceleration is radians per second squared rad/s² . This unit measures the rate at which an object's angular velocity its rate of rotation changes over time. Radians rad : Represents an angle.Seconds s : Represents time.
Source: PAF Air Force Commission Past Paper
Q272: A NAND gate is a combination of an?
Correct Answer: (A) AND gate and NOT gate
A NAND gate outputs the NOT of the AND gate output. It can be seen as an AND gate followed by a NOT gate.AND gate: first processes the inputs.NOT gate: then inverts the output of the AND gate.
Source: PAF Air Force Commission Past Paper
Q273: The operation used in rectification is?
Correct Answer: (D) Conversion of AC to DC
The operation used in rectification is "Conversion of AC to DC". Rectification is the process of converting alternating current AC into direct current DC by using devices like diodes, which only allow current to flow in one direction.
Source: PAF Air Force Commission Past Paper
Q274: ixi=jxj=kxk=?
Correct Answer: (B) 0
- i × i = 0 - j × j = 0 - k × k = 0Because the cross product of any vector with itself is always zero.So, i × i = j × j = k × k = 0
Source: PAF Air Force Commission Past Paper
Q275: When weight of an object when its mass is 20kg ?
Correct Answer: (B) 196 N
To find the weight of an object, use the formula:Weight W = mass m × acceleration due to gravity g Given: - Mass, m = 20 kg - g ≈ 9.8 m/s²Calculation: W = 20 × 9.8 = 196 Newtons
Source: PAF Air Force Commission Past Paper
Q276: The drag force on a small spherical body moving through a viscous fluid is given by?
Correct Answer: (A) F = 6πηrv
Stokes' Law applies to the drag force experienced by a small spherical object moving at low velocity through a viscous fluid. - Drag force, F = 6πηrv, is directly proportional to the fluid's viscosity η , the sphere's radius r , and its velocity v . This is Stokes' law for drag force, where: - η = viscosity of the fluid - r = radius of the sphere - v = velocity of the sphere through the fluid
Source: PAF Air Force Commission Past Paper
Q277: Choose the correct spelling: Glamrous, Glamorous, Glamoros, None of these?
Correct Answer: (B) Glamorous
Glamorous means مسحور کن
Source: PAF Air Force Commission Past Paper
Q278: Correct spelling: Assessment, Assesment, Assiment, Assement?
Correct Answer: (A) Assessment
Assessment تشخیص
Source: PAF Air Force Commission Past Paper
Q279: Choose the correct spelling. Anotate, Annotate, Ennotate, Annotet?
Correct Answer: (B) Annotate
Annotate is the correct spelling. Annotate means to explain.Annotate means تشریح کرناagm.04.03.23
Source: PAF Air Force Commission Past Paper
Q280: I put ?my shoes.
Correct Answer: (B) On
I put on my shoes.میں نے اپنے جوتے پہن لیے۔We use "put on" when referring to wearing clothes or shoes.
Source: PAF Air Force Commission Past Paper
Q281: Voice Change: The birds are kept by her. Active Voice ?
Correct Answer: (B) She kept the birds.
Passive voice: The birds are kept by her.Identify subject, verb, object:Subject = The birdsVerb = are kept present simple, passive Object/Agent = herConvert to active: Subject becomes she, verb changes to present simple active keeps, and object becomes the birds.Active voice: She keeps the birds.
Source: PAF Air Force Commission Past Paper
Q282: He gave me ?one rupee note.
Correct Answer: (A) A
He gave me a one-rupee note.Even though "one" starts with a vowel letter, it sounds like it begins with a consonant /w/ sound. So, we use "a" instead of "an".
Source: PAF Air Force Commission Past Paper
Q283: What is the dimensional formula of frequency?
Correct Answer: (B) T⁻¹
- Frequency is defined as the number of cycles or oscillations per second. - SI unit: Hertz Hz = 1/second - Dimensional formula of frequency: T⁻¹ - It is a scalar quantity and fundamental in wave and oscillation problems.
Source: PAF Air Force Commission Past Paper
Q284: Which logic gate has only one gate?
Correct Answer: (C) NOT gate
The NOT gate inverter is the only basic logic gate that has one input and one output, and it outputs the opposite inverted value of the input.
Source: PAF Air Force Commission Past Paper
Q285: Choose an option that is correct according to the standard use of English: He gave me all the maps free?
Correct Answer: (A) He gave me all the maps free
The correct option is: He gave me all the maps freely.This sentence is grammatically correct and conveys the intended meaning that he gave the maps without charging any money.
Source: PAF Air Force Commission Past Paper
Q286: Change the voice: He gave me a flower yesterday.
Correct Answer: (A) I was given a flower by him yesterday
He gave me a flower yesterday means کل اس نے مجھے ایک پھول دیا تھاPast Indefinite tense Active Voice= Subject + Second Form of Verb + Object. Passive Voice = Object + was/were + third of verb + by + subject. You can use either depending on what you want to emphasize: - Emphasizing the receiver → I was given... - Emphasizing the object → A flower was given...
Source: PAF Air Force Commission Past Paper
Q287: What is the Synonym of IMPART?
Correct Answer: (C) Communicate
IMPART means فراہم کرنا, عنایت کرنا Communicate means بات چیت
Source: PAF Air Force Commission Past Paper
Q288: Choose the correct spelling. Precedesce, Precedence, Precedense, All are wrong?
Correct Answer: (B) Precedence
Precedence means ترجیح
Source: PAF Air Force Commission Past Paper
Q289: I need to ?my shoes before going outside.
Correct Answer: (B) Put on
I need to put on my shoes before going outside.مجھے باہر جانے سے پہلے اپنے جوتے پہننے کی ضرورت ہے۔"Put on" is the correct phrasal verb for dressing or wearing items like shoes or clothes.
Source: PAF Air Force Commission Past Paper
Q290: Antonym of dense is?
Correct Answer: (B) Thin
- Dense = گھنا / موٹا - Thin = پتلا / دبلا
Source: PAF Air Force Commission Past Paper
Q291: The Antonym of Condense is?
Correct Answer: (C) Expand
Condense means کسی چیز کو کم کرنے یا اس سے زیادہ کمپیکٹ بنانے کے لئےExpand means توسیع
Source: PAF Air Force Commission Past Paper
Q292: Choose the correct spelling word? Heighte, Height, Haght, Hieght?
Correct Answer: (B) Height
Height اونچائی
Source: PAF Air Force Commission Past Paper
Q293: Choose the correct spelling word? Magnifecent, Magnificent, Magnefisent, Magneficent?
Correct Answer: (B) Magnificent
Magnificent شاندار
Source: PAF Air Force Commission Past Paper
Q294: Choose the correct spelling? Entegrity, Intigrety, Entigrety, Integrity?
Correct Answer: (D) Integrity
سالمیت Integrity
Source: PAF Air Force Commission Past Paper
Q295: Choose the correct spelling? Cammander, Commander, Commender, Comander?
Correct Answer: (B) Commander
Commander کمانڈر
Source: PAF Air Force Commission Past Paper
Q296: Choose the correct spelling. Comissioner, Commissioner?
Correct Answer: (B) Commissioner
Commissioner is the correct spelling. Commissioner means ناظم
Source: PAF Air Force Commission Past Paper
Q297: Mass is a ?
Correct Answer: (A) Scalar quantity
Mass is a scalar quantity- It measures the amount of matter in an object. - It is independent of location same on Earth, Moon, etc. . - Units: kilograms kg - Mass does not change with shape or size.
Source: PAF Air Force Commission Past Paper
Q298: In Einstein's mass-energy equation 'e' is the:?
Correct Answer: (D) speed of light
Einstein's Big Idea homepage. E = mc2. It's the world's most famous equation "Energy equals mass times the speed of light squared.ND19-3-2023
Source: PAF Air Force Commission Past Paper
Q299: In a sample of a substance, at any given temperature the energy of all particles will?
Correct Answer: (A) Not be same
In a sample of a substance, the particles atoms or molecules have a distribution of energies at any given temperature. This is known as the Maxwell-Boltzmann distribution. According to this distribution, some particles have high energies, while others have low energies, but the average energy of the particles is constant at a given temperature.The energy of individual particles in a sample is not the same, as they are in constant motion and colliding with each other, leading to a range of energies. This is why the concept of average energy or kinetic energy is used to describe the energy of a
Source: PAF Air Force Commission Past Paper
Q300: Photoelectic effect shown by ?
Correct Answer: (C) Light electromagnetic radiation
The photoelectric effect is shown by light electromagnetic radiation . The photoelectric effect is the phenomenon where electrons are ejected from a material when exposed to light. Since light is a form of electromagnetic radiation, it can trigger this effect.
Source: PAF Air Force Commission Past Paper
Q301: The substances which can be strongly magnetized are called ?
Correct Answer: (A) Ferromagnetic
Ferromagnetic substances can be strongly magnetized due to the alignment of their atomic dipoles in the same direction.Common examples include iron, cobalt, and nickel.
Source: PAF Air Force Commission Past Paper
Q302: Synonym of the Wild?
Correct Answer: (B) Savage
- Savage = وحشی - Wild = جنگلی
Source: PAF Air Force Commission Past Paper
Q303: The formula for gravitational acceleration at height h above the Earth's surface is?
Correct Answer: (B) gₕ = g × R / R + h ²
Gravitational acceleration at a height h above Earth's surface is less than at the surface.- Formula: gₕ = g × R / R + h ² - As h increases, gₕ decreases. - This is due to the inverse square law of gravity: force and thus acceleration weakens with the square of the distance from the center of the Earth. - At very high altitudes like satellites , gravity is still present but weaker.
Source: PAF Air Force Commission Past Paper
Q304: Torque is defined as?
Correct Answer: (C) Product of force and perpendicular distance from axis of rotation
Torque τ measures the rotational effect of a force. It is calculated as: τ = Force × Perpendicular distance lever arm Unit: Newton-meter N·m It determines how effectively a force can rotate an object about an axis.
Source: PAF Air Force Commission Past Paper
Q305: Choose the passive voice of: 'The teacher teaches English.
Correct Answer: (A) English is taught by the teacher.
Tense: Present simple - Active: Subject + verb + object → The teacher teaches English - Passive: Object + is/are + past participle + by + subject - English is taught by the teacher.
Source: PAF Air Force Commission Past Paper
Q306: The equation of a straight line with slope m and y-intercept c is?
Correct Answer: (A) y = mx + c
This is the standard slope-intercept form of a straight line:y = mx + c, where - m is the slope - c is the y-intercept
Source: PAF Air Force Commission Past Paper
Q307: A projectile is thrown with velocity 30m/s at an angle of 45. Find its range.
Correct Answer: (C) 92 m
To find the range R of a projectile, use the formula:R = u² * sin 2θ / gWhere: - u = initial velocity = 30 m/s - θ = angle of projection = 45° - g = acceleration due to gravity = 9.8 m/s²--Step-by-step:- sin 2θ = sin 2 × 45° = sin 90° = 1 - R = 30² × 1 / 9.8 - R = 900 / 9.8 ≈ 91.84 meters91.84 to the nearest whole number gives: 92 meters
Source: PAF Air Force Commission Past Paper
Q308: Geostationary satellites revolves around the Earth in?
Correct Answer: (B) 24 hr
Direction: West to east, matching the Earth's rotation.Altitude: About 22,300 miles 35,800 km above the equator.Orbital Period: 24 hours, the same as Earth's rotational period.Location: Directly above the Earth's equator.
Source: PAF Air Force Commission Past Paper
Q309: Which experiment demonstrated the dual nature of light?
Correct Answer: (B) Photoelectric effect
The dual nature of light is demonstrated by experiments such as the Double-Slit Experiment, This shows light's wave properties through diffraction and interference patterns, and the Photoelectric Effect.This reveals its particle photon nature by showing that light energy is quantized. The Compton Effect further supports the particle nature by showing that photons collide with electrons as particles
Source: PAF Air Force Commission Past Paper
Q310: When light enter from vacuum to water which of the following quantity will not change?
Correct Answer: (C) Frequency
Speed decreases due to higher refractive index of water .- Wavelength decreases since speed = frequency × wavelength .- Direction may change refraction .- Frequency remains constant because it’s determined by the source of the light, not the medium.
Source: PAF Air Force Commission Past Paper
Q311: Transverse nature of light was confirmed by the phenomenon of the ?
Correct Answer: (A) Polarization of light
Polarization confirms light is a transverse wave because it involves restricting oscillations to a specific plane.For polarization, light must have oscillating components in different planes.Transverse waves have oscillations perpendicular to the direction of wave propagation, allowing polarization.
Source: PAF Air Force Commission Past Paper
Q312: Detect the grammatical error in the following sentence: Twenty five kilometers/ from Hala to Hyderabad/are/a/long distance?
Correct Answer: (C) Are
The grammatical error in the sentence is: "are".The subject of the sentence is "Twenty five kilometers", which is a singular noun phrase, so the verb should be singular as well. The correct verb would be "is", not "are".The corrected sentence would be: "Twenty five kilometers from Hala to Hyderabad is a long distance."
Source: PAF Air Force Commission Past Paper
Q313: LASER beam can be sharply focused because it is?
Correct Answer: (A) Highly coherent
A LASER beam can be sharply focused because it is highly coherent. Coherence refers to the well-organized nature of light waves in a laser beam, where all the waves are in phase with each other, allowing them to be concentrated into a small, focused spot
Source: PAF Air Force Commission Past Paper
Q314: Which device is used as a particle accelerator?
Correct Answer: (B) Cyclotron
A cyclotron is a device used to accelerate charged particles in a circular path.It is commonly used in nuclear physics and medical applications.
Source: PAF Air Force Commission Past Paper
Q315: Which of the following quantities is conserved in Pair production?
Correct Answer: (D) All of them
In pair production, several quantities are conservedLet's evaluate each option:- Charge:A charge is conserved in pair production, as the total charge before and after the interaction remains the same Due to the opposite but equal charges of the electron and positron.- Energy: Energy is conserved in pair production, with the total energy before the interaction equal to the sum of the energies of the electron and positron after the interaction.- Linear Momentum: Linear momentum is conserved in pair production, with the total momentum before the interaction equal to the sum of the momenta of the
Source: PAF Air Force Commission Past Paper
Q316: What is ΔH equal to according to the first law of thermodynamics?
Correct Answer: (B) ΔE + P ΔV
The enthalpy is defined by H = E + pV for a change in the states of a system. ΔH = Δ E + pV = ΔE + Δ pV = ΔE + pΔV + VΔp Enthalpy, H, is a thermodynamic property that describes the heat lost or gained in a system. The change in enthalpy, ΔH, is equal to the sum of the change in internal energy, ΔU, plus the product of the constant pressure, P, and the change in volume, ΔV.
Source: PAF Air Force Commission Past Paper
Q317: The dimensions of Planck's constant are the similar to?
Correct Answer: (B) Angular momentum
The dimensions of Planck's constant are the same as those of angular momentum. Planck's constant h is a fundamental constant in quantum mechanics It relates the energy E of a photon to its frequency ν through the equation E = hν. The dimensions of Planck's constant can be derived from this relationship, And they are found to be the same as those of angular momentum
Source: PAF Air Force Commission Past Paper
Q318: The rate of change of angular momentum is called?
Correct Answer: (A) Torque
Torque is the rotational analog of force and equals the rate of change of angular momentum.Common symbols, T, MSI unit N⋅mOther units pound-force-feetIn SI base units kg⋅m2⋅s−2
Source: PAF Air Force Commission Past Paper
Q319: Identify the verb type in the sentence? He killed a snake?
Correct Answer: (B) Transitive verb
The verb "killed" is transitive, and the object is "a snake."
Source: PAF Air Force Commission Past Paper
Q320: Change the voice: Which teacher teaches you English?
Correct Answer: (A) By which teacher are you taught English?
The Passive Voice of Interrogative Sentence of Present Indefinite Tense can be made by applying the following procedure:Use helping verb is/are/am according to subject of Passive Voice sentence.Convert the object of Active Voice Sentence into the subject.Use the 3rd form of verb.Then add the word “by”, in order to show the doer.Then convert the subject of Active Voice Sentence into the object.After that put the remaining words if there are any in Active Voice of Interrogative Sentence.At the end use the sign of interrogation”?”, in order to show the interrogative nature of the sentence.
Source: PAF Air Force Commission Past Paper
Q321: Which sentence is correctly punctuated? She said I am tired.
Correct Answer: (D) She said, I am tired.
In direct speech, a comma is used to separate the reporting clause from the quoted speech. The correct format is: She said, "I am tired."
Source: PAF Air Force Commission Past Paper
Q322: Correct the sentence: She told that she is tired.
Correct Answer: (D) She told me that she was tired.
The verb "told" requires an object e.g., "me" . The tense of reported speech changes when the reporting verb is in the past tense.
Source: PAF Air Force Commission Past Paper
Q323: Change the narration: She said, "I am feeling tired now.
Correct Answer: (C) She said that she was feeling tired then.
She said that she was feeling tired then.In reported speech, present continuous "am feeling" changes to past continuous "was feeling.""Now" changes to "then."
Source: PAF Air Force Commission Past Paper
Q324: The value of log₁₀ 1000 ?
Correct Answer: (B) 3
log₁₀ 1000 means “10 raised to what power gives 1000?” Since 10³ = 1000, log₁₀ 1000 = 3.
Source: PAF Air Force Commission Past Paper
Q325: log 10 is equal to?
Correct Answer: (A) 1
The value of the log can be either with base 10 or with base e. The log10 10 value is 1while the value of loge 10 or ln 10 is 2.302585.ND18-9-2023
Source: PAF Air Force Commission Past Paper
Q326: Log₁₀ √10 = ?
Correct Answer: (A) 1/2
To evaluate the expression:Log₁₀ √10First, rewrite the square root as an exponent:√10 = 10^ 1/2 Now, apply the logarithm:Log₁₀ 10^ 1/2 Using the property of logarithms that states logₐ a^x = x:Log₁₀ 10^ 1/2 = 1/2
Source: PAF Air Force Commission Past Paper
Q327: The speed of sound in vacuum is?
Correct Answer: (A) 0 m/s
The speed of sound in vacuum is 0 m/s because sound cannot propagate in a vacuum as there is no medium for the sound waves to travel through.
Source: PAF Air Force Commission Past Paper
Q328: Synonym of WIELD ?
Correct Answer: (D) Exert
WIELD چلانا , بروئے کار لانا Exert زور لگانا
Source: PAF Air Force Commission Past Paper
Q329: The dimensional formula of angular velocity is?
Correct Answer: (C) T ⁻¹
Angular velocity = angle/time Since angle is dimensionless, only time remains in the denominator. So, its dimensional formula is T ⁻¹
Source: PAF Air Force Commission Past Paper
Q330: According to Bernoulli’s principle, when the speed of a fluid increases, the pressure?
Correct Answer: (B) Decrease
According to Bernoulli's principle, when the speed of a fluid increases, the pressure exerted by the fluid decreases. This principle is a consequence of the conservation of energy, which states that the total energy of the fluid including pressure, kinetic, and potential energy remains constant in a steady flow. Therefore, an increase in the fluid's speed kinetic energy must be compensated by a decrease in pressure energy.
Source: PAF Air Force Commission Past Paper
Q331: The derivative of sin x with respect to x is?
Correct Answer: (A) cos x
The standard derivative of sin x with respect to x is cos x . d/dx sin x = cos x
Source: PAF Air Force Commission Past Paper
Q332: He runs ?fast?
Correct Answer: (A) Very
"He runs very fast.""very" is an adverb used to intensify another adverb like "fast" ."much" and "many" are typically used with quantities e.g., "much time", "many apples" ."more" is comparative e.g., "He runs more quickly than her" .
Source: PAF Air Force Commission Past Paper
Q333: A diode is made of?
Correct Answer: (B) Doped semiconductor
A diode is made by joining P-type and N-type doped semiconductors to form a PN junction, which allows current to flow in only one direction.
Source: PAF Air Force Commission Past Paper
Q334: Which impurity is added to form an N-type semiconductor?
Correct Answer: (B) Pentavalent
To form an n-type semiconductor, a pentavalent impurity an element from Group 15 of the periodic table is added to a pure semiconductor. Common examples of such impurities are Phosphorus P , Arsenic As , and Antimony Sb . These pentavalent atoms have five valence electrons, Providing one extra electron to the semiconductor material, Which then acts as a free electron and becomes the majority charge carrier.
Source: PAF Air Force Commission Past Paper
Q335: The root mean square value of the alternating current is equal to?
Correct Answer: (B) Constant for all angles
The RMS Root Mean Square value of an AC signal is a measure of its effective value, Representing the DC equivalent that would produce the same amount of heat in a resistive load. For a given AC signal, its RMS value is a constant and does not vary with the instantaneous phase angle.Constant for all angles:The RMS value of a specific AC signal is a single, fixed value calculated over a full cycle, And it does not change with the instantaneous phase angle
Source: PAF Air Force Commission Past Paper
Q336: 14 dozen eggs cost Rs.100. If another 48 eggs are bought at Rs.12 per dozen, what is the total cost?
Correct Answer: (C) Rs.148
- 14 dozen eggs = Rs.100 - 48 eggs = 4 dozen → 4 × 12 = Rs.48 - Total = Rs.100 + Rs.48 = Rs.148Last updated 14-feb-2026
Source: PAF Air Force Commission Past Paper
Q337: If an electron has zero orbital angular momentum, the magnitude of its magnetic dipole moment equals:?
Correct Answer: (D) 0
If an electron has zero orbital angular momentum, its magnetic dipole moment also equals zeroThis is because the magnetic dipole moment is directly proportional to the orbital angular momentum, and when the angular momentum is zero, the magnetic moment is also zero.
Source: PAF Air Force Commission Past Paper
Q338: If momentum of a car is increased by 20% then its K.E is increased by ?
Correct Answer: (A) 44%
Kinetic energy K is related to momentum p by K = p² / 2m. If momentum increases by 20%, the new momentum p' = 1.2p.The new kinetic energy K' = p' ² / 2m = 1.2p ² / 2m = 1.44p² / 2m = 1.44K.The percentage increase in K.E is K' - K / K × 100 = 1.44K - K / K × 100 = 44%.
Source: PAF Air Force Commission Past Paper
Q339: The momentum of an object at a given instant is independent of its ?
Correct Answer: (A) Acceleration
Momentum is given by the formula: p = mv, where m is mass and v is velocity or speed .It depends on mass and speed, not on acceleration, so momentum is independent of acceleration.
Source: PAF Air Force Commission Past Paper
Q340: Change in Momentum in one second is called ?
Correct Answer: (C) Force
Force = Change in momentum / Time from Newton’s second law .So, change in momentum in one second is defined as force.
Source: PAF Air Force Commission Past Paper
Q341: Formula of Momentum = ?× velocity.
Correct Answer: (B) Mass
Momentum is the product of an object’s mass and its velocity → Momentum = Mass × Velocity.Momentum is given by the formula: p = mvIt is a vector quantity.It is conserved in closed systems during collisions.It depends on mass and speed, not on acceleration, so momentum is independent of acceleration.
Source: PAF Air Force Commission Past Paper
Q342: If the net force on a body is zero, then the body will be?
Correct Answer: (A) At rest or move with constant velocity
If the net force on a body is zero, then the body will be at rest or move with constant velocity. This is a direct consequence of Newton's First Law of Motion, which states that an object at rest will remain at rest, And an object in motion will continue to move with the same speed and in the same direction unless acted upon by an unbalanced force.
Source: PAF Air Force Commission Past Paper
Q343: The condition Book on table is an example of?
Correct Answer: (A) Newton’s 1st Law
Newton’s First Law Law of Inertia states: "An object at rest will stay at rest unless acted upon by an unbalanced force." The condition of a book on a table is an example of stable equilibrium and represents a state of balanced forces. The book is in stable equilibrium because if slightly displaced, it will return to its original position. It's an example of balanced forces because the downward force of gravity is equal And opposite to the upward normal force from the table, resulting in a net force of zero and no movement, as described by Newton's First Law of Motion.
Source: PAF Air Force Commission Past Paper
Q344: A body continues it's state of rest or uniform motion unless acted upon by an unbalanced force. This is the ?
Correct Answer: (A) First law of motion
First law of motion is also called the Law of Inertia.It states that an object will stay at rest or move with constant velocity unless an external force changes its state.
Source: PAF Air Force Commission Past Paper
Q345: A body is in equilibrium when it has ?
Correct Answer: (D) Zero acceleration
A body is in equilibrium when the net force acting on it is zero, and it is not changing its motion.This means that the body is either at rest or moving with a constant velocity uniform speed , but not accelerating.
Source: PAF Air Force Commission Past Paper
Q346: What is the next number in the sequence? 23, 5, 63, 9, 73, ?
Correct Answer: (A) 13
Let's look at the pattern in the sequence:23, 5, 63, 9, 73, ?Break it into two alternating sequences:- 1st, 3rd, 5th terms odd positions : 23, 63, 73 - 2nd, 4th, 6th terms even positions : 5, 9, ? Odd positions: 23 → 63 → 73 → +40 → +10 Even positions: 5 → 9 → ? → +4 → ? If the pattern of +4 continues:9 + 4 = 13
Source: PAF Air Force Commission Past Paper
Q347: Pick the odd one out :Yellow , Red ,Green , Blue?
Correct Answer: (C) Yellow
Blue, Red ,Green are primary colours While yellow is secondary colour obtained by mixing two primary colours.
Source: PAF Air Force Commission Past Paper
Q348: ?winters are generally very cold here.
Correct Answer: (C) The
The winters are generally very cold here. Refers to winters in this specific place, as a known fact.
Source: PAF Air Force Commission Past Paper
Q349: The value of gravitational acceleration g on Mars is approximately?
Correct Answer: (A) 3.7 m/s²
The value of gravitational acceleration g on the surface of Mars is approximately 3.71 m/s². This is about 38% of Earth's gravitational acceleration, which is roughly 9.8 m/s².
Source: PAF Air Force Commission Past Paper
Q350: Hot is To Burn and Cold is To?
Correct Answer: (C) Freez
hot is burn similarly cold is to freeze
Source: PAF Air Force Commission Past Paper
Q351: 10, 20, 40, 80, ?
Correct Answer: (A) 160
The pattern of the sequence is doubling the previous term:10 × 2 = 2020 × 2 = 4040 × 2 = 8080 × 2 = 160So, the next number in the sequence is 160.
Source: PAF Air Force Commission Past Paper
Q352: My wife and me have two sons. Each son has one sister. How many members are there in my family?
Correct Answer: (B) Five
You the husband Your wifeTwo sonsEach son has one sister, which means there is one daughter not two, as both sons share the same sister So, the family consists of:2 parents you and your wife 2 sons1 daughterAdding them up:2+2+1=5
Source: PAF Air Force Commission Past Paper
Q353: Pointing to Anwar's photograph, Abdul said, "He is the son of the only daughter of the father of my brother." What relationship does Abdul have with Anwar?
Correct Answer: (A) Maternal Uncle
"Father of my brother" refers to Abdul's father."Only daughter of the father" refers to Abdul's sister since Abdul's father has only one daughter ."He is the son of..." refers to Anwar being the son of Abdul's sister.Therefore, Abdul is Anwar's:Maternal Uncle
Source: PAF Air Force Commission Past Paper
Q354: X does not have any sons or brothers but Y’s father is X’s father-son. What is Y to X?
Correct Answer: (A) Daughter
X does not have any sons or brothers but Y’s father is X’s father-son. Daughter is Y to X***Y term is used here as female.X is a boy and Y is a girl.X does not have a son or brother.Y’s father and X are the same people.Therefore, Y is the daughter of X.
Source: PAF Air Force Commission Past Paper
Q355: D is A’s son. C is the mother of P and wife of D. How is A related to C?
Correct Answer: (C) Father-in-law
C is the wife of D and D is the son of A. Hence, A is either father-in-law or mother-in-law.
Source: PAF Air Force Commission Past Paper
Q356: Semiconductors e.g., germanium, silicon are substances whose electrical conductivity lies in between?
Correct Answer: (C) Conductors and insulators
Semiconductors, like silicon and germanium, are substances whose electrical conductivity lies between that of conductors such as metals and insulators such as rubber .Their ability to conduct electricity under specific conditions, Along with their moderate conductivity and the possibility to vary their propertiesMakes them essential for modern electronic components like diodes and transistors.
Source: PAF Air Force Commission Past Paper
Q357: Cold : Hot :: Bright : ?
Correct Answer: (C) Dark
"Cold" is the opposite of "Hot", Similarly, "Bright" is the opposite of "Dark".
Source: PAF Air Force Commission Past Paper
Q358: The miser gazed?at the pile of gold coins in front of him.
Correct Answer: (C) Avidly
The word "avidly" means with great enthusiasm or eagerness, which fits the context of a miser gazing at a pile of gold coins.A miser is someone who loves money and material wealth, so it's likely they would gaze at their treasure with a strong desire and enthusiasm.Here's the sentence with the correct answer: The miser gazed avidly at the pile of gold coins in front of him.
Source: PAF Air Force Commission Past Paper
Q359: Torque is a ?
Correct Answer: (A) vector quality
Torque is a vector quantity. The direction of the torque vector depends on the direction of the force on the axis
Source: PAF Air Force Commission Past Paper
Q360: The velocity time graph is straight line with time axis then acceleration is? Positive, Negative, Zero, Variable?
Correct Answer: (C) Zero
When the velocity-time graph is a straight line parallel to the time axis then its acceleration is zero.This is because velocity is constant w.r.t time ie., the change in velocity is zero.Hence, the acceleration is also zero.
Source: PAF Air Force Commission Past Paper
Q361: A Carnot engine, with its cold body at 17°C, has 50% efficiency. If the temperature of its hot body is now increased by 145°C, the efficiency becomes ?
Correct Answer: (C) 60%
Given:Initial efficiency η₁ = 50% = 0.5Initial cold body temperature T₁ = 17°C = 290 KInitial hot body temperature T₂ = unknownWe know that the efficiency of a Carnot engine is:η = 1 - T₁ / T₂ 0.5 = 1 - 290 K / T₂ T₂ = 580 KNow, the hot body temperature is increased by 145°C:New hot body temperature T₂' = 580 K + 145°C = 725 KNew efficiency η₂ is:η₂ = 1 - T₁ / T₂' = 1 - 290 K / 725 K ≈ 0.6New efficiency η₂ is approximately 60%.
Source: PAF Air Force Commission Past Paper
Q362: Active voice of "Her face is being washed by Huma".
Correct Answer: (C) Huma is washing her face.
The passive sentence "Her face is being washed by Huma" is converted to the active voice as "Huma is washing her face".It indicating the subject Huma is performing the action.
Source: PAF Air Force Commission Past Paper
Q363: What one is the best like the other three? Dog, Cow, Tiger, Snake?
Correct Answer: (D) Snake
Dog, Cow, and Tiger are mammals - they are warm-blooded, have fur/hair, and give birth to live young most of the time .Snake is a reptile - it is cold-blooded, has scales, and lays eggs.So, Dog, Cow, and Tiger are more alike, and Snake is the odd one out.
Source: PAF Air Force Commission Past Paper
Q364: Find the odd one out in the given series: 51,64,121,144,256?
Correct Answer: (A) 51
51, 64, 121, 144, 256Check if they are perfect squares:- 51 → Not a perfect square - 64 → 8² - 121 → 11² - 144 → 12² - 256 → 16² All are perfect squares except 51.
Source: PAF Air Force Commission Past Paper
Q365: Choose the odd one out? 17458, 13762, 13545, 29498, 27993?
Correct Answer: (C) 13545
The odd one out is 13545 Because it is the only number in the list that is odd, While 17458, 13762, 29498, and 27993 are all even numbers. Even Numbers: Numbers that are divisible by 2 end in 0, 2, 4, 6, or 8 .Odd Numbers: Numbers that are not divisible by 2 end in 1, 3, 5, 7, or 9
Source: PAF Air Force Commission Past Paper
Q366: Find the odd one out? July, March, December, and February?
Correct Answer: (D) February
January 31July 31March 31February 28******ND11-12-2022
Source: PAF Air Force Commission Past Paper
Q367: Semi-conductor germanium and silicon are?
Correct Answer: (D) Tetravalent
Semi-conductors like germanium and silicon are tetravalent. "Tetravalent" means they have four valence electrons, which is the key characteristic of semiconductor elements. Pentavalent: This means having five valence electrons.Trivalent: This means having three valence electrons.Divalent: This means having two valence electrons.
Source: PAF Air Force Commission Past Paper
Q368: The element present in large amount of rock and mineral?
Correct Answer: (B) Silicon
Silicon is the second most abundant element in the Earth's crust, Making up a large portion of most rocks and minerals, particularly silicates, which are composed of silicon and oxygen. Earth's Crust Elements1 Oxygen O 46.1%2 Silicon Si 28.2%3 Aluminum Al 8.2%4 Iron Fe 5.6%
Source: PAF Air Force Commission Past Paper
Q369: In molluscs, body is covered by a glandular epithelial envelope called.
Correct Answer: (C) Mantle
The body is covered by a glandular epithelial envelope called a mantle They secrete a calcareous shell
Source: PAF Air Force Commission Past Paper
Q370: These are the two most common elements in the earth crust?
Correct Answer: (B) Oxygen and Silicon
The two most common elements in the Earth's crust are:Oxygen O - about 46.6% by weightSilicon Si - about 27.7% by weightTogether, they form most of the silicate minerals, which make up the majority of the crust. Last updated 14-feb-2026
Source: PAF Air Force Commission Past Paper
Q371: Gap between semiconductor?
Correct Answer: (B) Very wide
A semiconductor with a large value is called a wide-band-gap semiconductorLight emitting diode is a 2-lead semiconductor device. The name semiconductor comes from the fact that these materials have electrical conductivity between a metal, like copper, gold, etc., and an insulator, like glass. They have an energy gap of less than 4eV about 1eV .
Source: PAF Air Force Commission Past Paper
Q372: The cause of the potential barrier in a PN diode is ?
Correct Answer: (C) Depletion of positive and negative charges near the junction
The potential barrier in a PN diode is caused by the depletion region, where mobile positive and negative charges near the junction diffuse and leave behind immobile ions.This depletion creates an electric field that opposes further charge movement, forming the potential barrier.
Source: PAF Air Force Commission Past Paper
Q373: The reverse current in the diode is due to?
Correct Answer: (B) Minority carriers
The reverse saturation current of a p-n junction diode is the current caused by the diffusion of minority carriers From the n-type/p-type regions quasi-neutral regions to the depletion region
Source: PAF Air Force Commission Past Paper
Q374: What is the minimum number of diodes required for full-wave rectification?
Correct Answer: (D) 4
The minimum number of diodes required for full-wave rectification using a bridge rectifier is four.
Source: PAF Air Force Commission Past Paper
Q375: The number of terminals in semiconductor diode are ?
Correct Answer: (C) 2
A semiconductor diode has 2 terminals: anode positive and cathode negative .It allows current to flow in one direction only, functioning as a rectifier.
Source: PAF Air Force Commission Past Paper
Q376: Heat is the form of ?
Correct Answer: (C) Energy
Heat is a form of energy, specifically thermal energy, which is transferred from one body to another due to a temperature difference.It is a type of kinetic energy, where the particles of a substance vibrate or move rapidly, generating heat.
Source: PAF Air Force Commission Past Paper
Q377: What comes next in the pattern: CAB, GEF, ?
Correct Answer: (B) KJI
Each group shifts the letters forward by +4 positions in the alphabet. C-A-B → G-E-F → K-J-I reverse order .
Source: PAF Air Force Commission Past Paper
Q378: Which one is different from rest? Shirt, Pant, Boat, Necktie?
Correct Answer: (C) Boat
Shirt, pants, and necktie are clothing items, While a boat is a vehicle, it is unrelated to clothing.
Source: PAF Air Force Commission Past Paper
Q379: If 5 glasses of lemon juice cost 75, what will be the price of 9 glasses?
Correct Answer: (C) 135
Price of 1 glass = 75 ÷ 5 = 15 Price of 9 glasses = 15 × 9 = 135
Source: PAF Air Force Commission Past Paper
Q380: If 10 men cover 10 km in 3 days, how much distance will 3 men cover in 3 days?
Correct Answer: (C) 3 km
Given: 10 men cover 10 km in 3 days. Step 1: Work done per man → 10 men = 10 km in 3 days → 1 man = 1 km in 3 days divide both sides by 10 Step 2: For 3 men → 1 man = 1 km in 3 days → 3 men = 3 × 1 = 3 km in 3 days
Source: PAF Air Force Commission Past Paper
Q381: Which one is different from the rest? Yard, Foot,Kilometer, Length?
Correct Answer: (D) Length
Yard, Foot, and Kilometer are all units of measurement for distance or length.Length is not a unit; it's a general term that describes the dimension being measured.ND18-9-2023
Source: PAF Air Force Commission Past Paper
Q382: Find the odd one out: 10, 25, 45, 54, 60, 75, 80.
Correct Answer: (B) 54
The odd one out is: 54The other numbers in the list 10, 25, 45, 75 all end in 5, while 54 ends in 4.
Source: PAF Air Force Commission Past Paper
Q383: What number will come next? 1, 2, 4, 8, 16, ?
Correct Answer: (C) 32
2 × 2 = 44 × 2 = 88 × 2 = 1616 × 2 = 32
Source: PAF Air Force Commission Past Paper
Q384: Which word is wrongly spelt in the following set of words? Relief, Sleeve, Speech, Recieve?
Correct Answer: (D) Recieve
Recieve means بازیافت"Recieve"; the correct spelling is "Receive"Relief: CorrectSleeve: CorrectSpeech: Correct
Source: PAF Air Force Commission Past Paper
Q385: Correct spelling is: A Sartify B Certify C Certiffy D Certafy?
Correct Answer: (B) Certify
"Certify تصدیق کرنا " is the correct spelling
Source: PAF Air Force Commission Past Paper
Q386: ?you get up early, make a glass of water.
Correct Answer: (B) When
When you get up early, make a glass of water. The word "when" is used to refer to the time something happens."When" is a subordinating conjunction used to introduce time-related clauses.
Source: PAF Air Force Commission Past Paper
Q387: You must obey your parents. Passive Voice ?
Correct Answer: (C) Your parents must be obeyed by you
Active Voice: You must obey your parents.Passive Voice: Your parents must be obeyed by you. Use be in passive voice.Use third form of a verb in passive voice
Source: PAF Air Force Commission Past Paper
Q388: Antonym of Minority is?
Correct Answer: (A) Large number
Minority اقلیت Large number بڑی تعداد
Source: PAF Air Force Commission Past Paper
Q389: Synonym of Minority is?
Correct Answer: (B) Subset
Minority means a smaller part of a group گروپ کا چھوٹا حصہ
Source: PAF Air Force Commission Past Paper
Q390: The capacity to do work is called?
Correct Answer: (A) Energy
The capacity of an object to do work is called energy.Energy can take many forms and is defined as the capacity a system or object has to perform work.
Source: PAF Air Force Commission Past Paper
Q391: The product of force and displacement is called?
Correct Answer: (B) Work
The product of force and displacement is called work. Work is defined as the transfer of energy by a force that causes an object to be displaced. Mathematically, it is represented as the scalar or dot product of the force F And the displacement d , or W = Fd cos θ, Where θ is the angle between the force and displacement vectors.
Source: PAF Air Force Commission Past Paper
Q392: Displacement is an example of a ?quantity?
Correct Answer: (D) Vector
Displacement is an example of a vector quantity because it has both magnitude size and direction. Unlike scalar quantities, which only have magnitude like distance or temperature , Displacement specifically describes the change in position from a starting point to an ending point, Including the direction of that change.
Source: PAF Air Force Commission Past Paper
Q393: Which of the following has strongest intermolecular forces of attraction ?
Correct Answer: (C) lodine I2
According to most sources, Iodine I2 has the strongest intermolecular forces of attraction Iodine I2 :Due to its large size and high number of electrons, Iodine experiences the strongest London dispersion forces, Which are the only type of intermolecular force present in nonpolar molecules like I2. These forces are relatively weak compared to other types of intermolecular forces, But in the case of large molecules like iodine, they become significant enough to result in a high boiling point.
Source: PAF Air Force Commission Past Paper
Q394: A magnetic field exerts a force on a charged particle ?
Correct Answer: (B) If the particle moving across the field lines
A magnetic field exerts a force on a charged particle when it is moving across the field lines.The force is zero if the particle is at rest or moving along the field lines.
Source: PAF Air Force Commission Past Paper
Q395: Force on a moving charge in a uniform magnetic field depends upon?
Correct Answer: (D) All of the above
The force on a moving charge in a uniform magnetic field depends on:Magnetic flux density B : The strength of the magnetic field.The charge on the particle q : The amount of charge on the particle.The speed of the particle v : The velocity at which the particle is moving.The force F on a moving charge in a uniform magnetic field is given by the Lorentz force equation: F = q v x B Where x denotes the cross product.
Source: PAF Air Force Commission Past Paper
Q396: The force of a magnet at the center is?
Correct Answer: (C) No power
The magnetic force of a bar magnet at its exact center is considered zero in an ideal case Because the opposing magnetic forces from the North and South poles cancel each other out. While the magnetic field lines are most dense and the force is strongest at the poles, They are parallel and have equal density at the center, resulting in a net force of zero.
Source: PAF Air Force Commission Past Paper
Q397: Convex lens is ?in center?
Correct Answer: (A) Thick
A convex lens is thicker at the center than at its edges. This shape is what allows a convex lens to converge parallel light rays, Bringing them together at a single point is called the principal focus.
Source: PAF Air Force Commission Past Paper
Q398: An image formed by a convex lens is called?
Correct Answer: (A) Real and Inverted
An image formed by a convex lens is called real and inverted.This occurs when the image is formed on the opposite side of the lens from the object.This is upside down relative to the object.
Source: PAF Air Force Commission Past Paper
Q399: How many types of convex lens?
Correct Answer: (C) 3
There are three primary types of convex lenses, classified by their curvature:Plano-Convex Lens: This lens has one flat surface and one outwardly curved spherical surface. Double Convex Lens Biconvex Lens : Both surfaces of this lens curve outward. Concave-Convex Lens Meniscus Lens : This lens has one side curved inward concave and the other curved outward convex .
Source: PAF Air Force Commission Past Paper
Q400: What is the work function of the metal if the light of wavelength 4000λ generates photo electrons of velocity 6 × 10^5 ms^-1 from it?
Correct Answer: (A) 2.1 eV
To find the work function, we need to calculate the energy of the photon E and the kinetic energy of the electron KE , then use the equation:φ = E - KEE = hc / λ = 1240 eV nm / 4000 nm = 3.1 eVKE = 1/2 mv^2 ≈ 1/2 × 9.11 × 10^-31 kg × 6 × 10^5 m/s ^2 ≈ 1.64 × 10^-19 J ≈ 1.024 eVφ = 3.1 eV - 1.024 eV ≈ 2.076 eV ≈ 2.1 eV
Source: PAF Air Force Commission Past Paper
Q401: An examples of kinetic energy would be ?
Correct Answer: (D) All of these
Kinetic energy is the energy of motion, and any object that is moving has kinetic energy.A moving car energy from motion A moving runner energy from motion A moving bicycle energy from motion
Source: PAF Air Force Commission Past Paper
Q402: What is the reason of kinetic energy?
Correct Answer: (B) Motion
Kinetic energy is the energy an object has because of its motion. If we want to accelerate an object, then we must apply a force.
Source: PAF Air Force Commission Past Paper
Q403: The time period of a simple pendulum depends upon the?
Correct Answer: (D) Length
The time period T of a simple pendulum is given by the formula:T = 2π√ L/g Where: - T = Time period - L = Length of the pendulum - g = Acceleration due to gravity approx. 9.8 m/s² - Mass of the bob does not affect the time period. - Amplitude if small has a negligible effect on the time period. - Air resistance is ignored in ideal conditions.
Source: PAF Air Force Commission Past Paper
Q404: The ratio of output voltage to input voltage in a transistor is called ?
Correct Answer: (B) Voltage gain of the amplifier
The ratio of output voltage to input voltage in a transistor circuit is called the voltage gain.It measures how much the amplifier increases the input signal voltage.
Source: PAF Air Force Commission Past Paper
Q405: A light year is related to ?
Correct Answer: (B) Distance
Light year refers to speed of light expressed in miles per year it is about ten trillion kilometers or six trillion miles .Light year is a unit of distance.Light Year: the distance that light can travel in one year. The distance light travels in one year is known as the light year.1 light year is equal to 9.5 x 10^12 kmND11-07-2023
Source: PAF Air Force Commission Past Paper
Q406: +5 - +7 = ?
Correct Answer: (B) -2
+5 - +7 = 5 - 7 = -2Subtracting a larger positive number from a smaller one gives a negative result.
Source: PAF Air Force Commission Past Paper
Q407: Which one is different from the rest? Red, Blue, Square, Green?
Correct Answer: (C) Square
The word "Square" is different because it is a geometric shape, While "Red", "Blue", and "Green" are colors.
Source: PAF Air Force Commission Past Paper
Q408: Different from the rest? 3, 7, 11, 14, 17, 21?
Correct Answer: (C) 14
Each of the numbers except 14 is an odd number.The number '14' is the only EVEN number
Source: PAF Air Force Commission Past Paper
Q409: Which one is different from the rest? Karachi, Kabul, Tehran, Beijing?
Correct Answer: (A) Karachi
- Karachi - City in Pakistan - Kabul - Capital of Afghanistan - Tehran - Capital of Iran - Beijing - Capital of ChinaKarachi is the only one that is not a capital city.The rest are national capitals.
Source: PAF Air Force Commission Past Paper
Q410: N-type material consists of?
Correct Answer: (A) Electron
An n-type semiconductor results from implanting dopant atoms that have more electrons in their outer bonding shell than silicon.
Source: PAF Air Force Commission Past Paper
Q411: Which one is different from the rest? Karachi, Kabul, Delhi, Dhaka?
Correct Answer: (A) Karachi
Karachi is different as it is the only one which is not the capital of any country.Karachi is the former capital of Pakistan and is now the capital of the province of SindhKabul is the capital of Afghanistan Delhi is the capital of IndiaDhaka is the capital of BangladeshND-6-09-2023
Source: PAF Air Force Commission Past Paper
Q412: Synonyms Perfect?
Correct Answer: (B) Fawless
Perfect مکمل کرناFlawless بے عیبND20-2-2023
Source: PAF Air Force Commission Past Paper
Q413: The synonym of PATRONAGE is?
Correct Answer: (C) Support
Patronage means مالی معاونتSynonym: Aid, support, Assistance Antonym: Attack, hinder
Source: PAF Air Force Commission Past Paper
Q414: Two masses attract each other; the force is called ?
Correct Answer: (C) Gravitational force
Gravitational force is the natural force of attraction between any two masses in the universe.This force is always attractive.It acts along the line joining the centers of the two masses.
Source: PAF Air Force Commission Past Paper
Q415: How many kinds of International System of Units have?
Correct Answer: (D) 7
The seven SI base units are:1. Meter m - for length 2. Kilogram kg - for mass 3. Second s - for time 4. Ampere A - for electric current 5. Kelvin K - for temperature 6. Mole mol - for amount of substance 7. Candela cd - for luminous intensity
Source: PAF Air Force Commission Past Paper
Q416: What is the sensitive instruments which represents presence of current?
Correct Answer: (D) Galvanometer
A galvanometer is an electromechanical measuring instrument for electric current.It is a very sensitive current meter order of magnitude 10 uA, while an ammeter is less sensitive order of magnitude 1 A .They came from the observation, first noted by Hans Christian Ørsted in 1820,
Source: PAF Air Force Commission Past Paper
Q417: Synonym of Incompatible is?
Correct Answer: (D) Mismatched
Incompatible:غیر مطابقت پذیرMismatched: مماثلND5-07-2023
Source: PAF Air Force Commission Past Paper
Q418: Which one is different from the rest? 2, 4, 20, 5?
Correct Answer: (D) 5
FIVE is different as it is an odd number while others are even. also, all others are divisible by 2 while 5 is not.ND18-9-2023
Source: PAF Air Force Commission Past Paper
Q419: In a class 33 students can speak Sindhi and 22 can speak both Urdu and Sindhi. How many students can speak only Sindhi?
Correct Answer: (A) 11
- Total students who can speak Sindhi = 33 - Students who can speak both Urdu and Sindhi = 22 To find: Students who can speak only SindhiOnly Sindhi = Total Sindhi - Both = 33 - 22 = 11 students
Source: PAF Air Force Commission Past Paper
Q420: The time period is reciprocal of?
Correct Answer: (C) Frequency
The reciprocal of frequency is its time period.The time taken for the one complete cycle is known as the time period, hence, the period is the reciprocal of the frequency.
Source: PAF Air Force Commission Past Paper
Q421: Which term is defined as the measure of an instrument by which it is error-free?
Correct Answer: (D) Accuracy
Accuracy is defined as the measure of how close an instrument's readings are to the true value.It indicating how error-free it is.
Source: PAF Air Force Commission Past Paper
Q422: Work done per unit time is called ?
Correct Answer: (C) Power
Power is the work done per unit time, measured in watts W .It represents the rate at which energy is transferred or work is done.Additional Information:Efficiency is the ratio of output to input energy.Energy is the ability to do work.Force is a push or pull that can cause an object to change its motion.
Source: PAF Air Force Commission Past Paper
Q423: The floating and sinking of objects depend on which one of the following?
Correct Answer: (A) Density
An object floats if its density is less than the liquid's density.An object sinks if its density is greater than the liquid's density.
Source: PAF Air Force Commission Past Paper
Q424: The motion repeated in periods?
Correct Answer: (D) Periodic
A motion that repeats itself after equal intervals of time is called periodic motion. The time it takes to complete one full repetition or cycle is known as the period. This type of motion is regular and predictable, with examples including a swinging pendulum, A planet orbiting the sun, or the vibration of a tuning fork.
Source: PAF Air Force Commission Past Paper
Q425: Antonym of invariable is?
Correct Answer: (C) Flexible
Invariable یعنی: ناقابلِ تغیّر, نہ بدلنے والا Flexible یعنی: لچکدار, آسانی سے بدلنے والا
Source: PAF Air Force Commission Past Paper
Q426: If the length of a simple pendulum is made four times, then its Time period will become ?
Correct Answer: (A) Double
The time period T of a simple pendulum is given by:T ∝ √LIf the length L is made four times:New time period T' ∝ √ 4L T' ∝ 2√LT' = 2TThe time period will become double.
Source: PAF Air Force Commission Past Paper
Q427: What will be the time period of a simple pendulum in a freely falling lift?
Correct Answer: (B) ∞
In a freely falling lift, both the pendulum and its support fall with the same acceleration g , creating a weightless condition.Since there is no restoring force no effective gravity , the pendulum does not oscillate, leading to an infinite time period.
Source: PAF Air Force Commission Past Paper
Q428: The value of gravitational acceleration changed by altitude?
Correct Answer: (B) Decrease
The value of gravitational acceleration, denoted by 'g', decreases as altitude increases. This is because gravity follows an inverse-square law with distance from the Earth's center, Meaning that as the distance R + h, where h is the altitude grows, the gravitational force weakens. A formula to calculate this is g h = g₀ R / R+h ², Where g₀ is the acceleration at sea level and R is the Earth's radius.
Source: PAF Air Force Commission Past Paper
Q429: The value of gravitational acceleration at poles is ?
Correct Answer: (C) Higher
The gravitational acceleration g is slightly higher at the poles than at the equator due to two main factors:Earth's Shape: The Earth is an oblate spheroid flattened at the poles , so the poles are closer to the planet's center of mass, increasing g.Centrifugal Force: The rotational speed of the Earth is lowest at the poles, reducing the outward centrifugal force that counteracts gravity.Thus, g is strongest at the poles and weaker at the equator.
Source: PAF Air Force Commission Past Paper
Q430: What is the approximate value of gravitational acceleration on Earth?
Correct Answer: (B) 9.8 m/s²
Near Earth's surface, the acceleration due to gravity is 9.8 m/s2 32 ft/s2 . This means that, ignoring the effects of air resistance, the speed of an object falling freely will increase by about 9.8 meters per second 32 ft/s every second.
Source: PAF Air Force Commission Past Paper
Q431: The unit of inertia depends on?
Correct Answer: (A) Mass
The units of rotational inertia or moment of inertia depend on the object's mass and its distribution relative to the axis of rotation. While basic inertia depends solely on mass, moment of inertia introduces the factor of distance from the axis of rotation, Resulting in units of kilogram-meter squared kg·m² in the SI system. Mass m : A larger mass means greater rotational inertia. Distribution of mass: The further the mass is from the axis of rotation, the larger the moment of inertia. Axis of rotation: The moment of inertia is specific to a chosen axis of rotation and will vary depending on
Source: PAF Air Force Commission Past Paper
Q432: What percent of 90 is 8?
Correct Answer: (C) 8.89%
Percentage = 8 / 90 * 100= 0.0889 * 100= 8.89%
Source: PAF Air Force Commission Past Paper
Q433: Which one is different from rest 3 5 7 9?
Correct Answer: (D) 9
9 is different from the rest.Reason: 3, 5, and 7 are prime numbers, while 9 is not it's divisible by 3 .
Source: PAF Air Force Commission Past Paper
Q434: If month is 4th day of the month, 18th day of the month will be?
Correct Answer: (A) Monday
If the 4th day of the month is a Monday, then to find the 18th day, we count 14 days ahead since 18 - 4 = 14 . 14 days = exactly 2 weeks, so the day remains the same.
Source: PAF Air Force Commission Past Paper
Q435: Which one is different from the rest? Islamabad, Karachi, Lahore, Pakistan?
Correct Answer: (D) Pakistan
Pakistan is different one. While Islamabad, Karachi, and Lahore are specific major cities in Pakistan, Pakistan is the country itself.Last updated 05-03-2026
Source: PAF Air Force Commission Past Paper
Q436: Synonym of Invariable is?
Correct Answer: (B) Constant
Invariable ناقابل تغیرConstant مستقل
Source: PAF Air Force Commission Past Paper
Q437: The density of water is ?
Correct Answer: (C) 1 g/cm3
The density of pure water at standard temperature 4°C is 1 g/cm³ or 1000 kg/m³.This value serves as a reference for measuring the density of other substances.
Source: PAF Air Force Commission Past Paper
Q438: The work done by friction is ?
Correct Answer: (C) Negative
Friction always acts opposite to the direction of motion, resisting movement.Since work = force × displacement × cos θ, and θ = 180°, cos 180° = - 1, so work is negative.
Source: PAF Air Force Commission Past Paper
Q439: Leaser is ?part of physics?
Correct Answer: (B) Atomic
A laser is an object of study within the branches of Atomic, Molecular, and Optical Physics AMO Physics And Laser Physics, which is itself a subfield of AMO Physics. Lasers operate based on principles of quantum mechanics and electromagnetism, Such as stimulated emission, and their development and applications fall under the domain of physics.
Source: PAF Air Force Commission Past Paper
Q440: She ?a magazine.
Correct Answer: (C) Reads
We use "read s " based on the subject and tense of the sentence.- "Reads" is the present simple form used with he, she, it. - Example: She reads a magazine.
Source: PAF Air Force Commission Past Paper
Q441: I am just ?out my new mobile.
Correct Answer: (D) Trying
The correct sentence is: I am just trying out my new mobile."Trying out" means to use something new to see if it meets expectations or works well.
Source: PAF Air Force Commission Past Paper
Q442: Longitudinal waves consist of?
Correct Answer: (C) Both A and B
Longitudinal waves do not consist of crests and troughsThey are made of compressions regions of high density and rarefactions regions of low density . Crests and troughs are characteristic of transverse waves, Where the particle motion is perpendicular to the wave's direction of travel.
Source: PAF Air Force Commission Past Paper
Q443: In a reflection ray angle of incidence is ?to the angle of reflection.
Correct Answer: (A) Equal
In a reflection, the angle of incidence is equal to the angle of reflection, according to the Law of Reflection. Both angles are measured from the normal line, Which is a line perpendicular to the reflective surface at the point where the light hits.
Source: PAF Air Force Commission Past Paper
Q444: Which of the following is longitudinal waves? Sound waves ,Light waves, Water waves, Electromagnetic waves?
Correct Answer: (A) Sound waves
Longitudinal waves are also called: Compressional waves, Pressure waves, Compression waves.A longitudinal wave is a wave in which the particles of the medium vibrate in the same direction as the wave propagates.
Source: PAF Air Force Commission Past Paper
Q445: The relationship between stress and strain is called - law?
Correct Answer: (A) Hooke's law
Strain and stress relationship is defined by Hooke's law. This point of the ratio between the strain and stress is called the proportional limit. The slope of the curve is referred to as the modulus of elasticity of Young's modulus.
Source: PAF Air Force Commission Past Paper
Q446: How many types of motion ?
Correct Answer: (C) 4
In the world of mechanics, there are four basic types of motion. These four are:Rotary, Oscillating, Linear Reciprocating.
Source: PAF Air Force Commission Past Paper
Q447: What happens when two opposite poles of magnets are brought close to each other?
Correct Answer: (B) They attract
When two opposite poles north-south or south-north of magnets are brought close to each other, they attract each other.This is because opposite poles have different polarities and therefore pull each other together.
Source: PAF Air Force Commission Past Paper
Q448: Get?the Bus .
Correct Answer: (B) On
Get on the bus.بس پر چڑھ جاؤ۔ We use getting on for entering or boarding large vehicles like buses, trains, or planes.
Source: PAF Air Force Commission Past Paper
Q449: The waves produced by oscillation of material particles are ?
Correct Answer: (C) Mechanical waves
Waves produced by oscillation of material particles require a medium to travel, called mechanical waves.Examples include sound waves and water waves.
Source: PAF Air Force Commission Past Paper
Q450: Waves which can only travel through a medium are called mechanical waves. Which one of the following is not a mechanical wave?
Correct Answer: (D) Infra-red wave
Infra-red waves are electromagnetic waves and do not require a medium to travel.Mechanical waves like water, sound, and seismic waves need a medium solid, liquid, or gas to propagate.
Source: PAF Air Force Commission Past Paper
Q451: She ?a uniform.
Correct Answer: (A) Wears
She wears a uniform وہ یونیفارم پہنتی ہے۔"She" is third-person singular → use "wears" in the present simple tense. - "wear" → base form **- "wears" → third-person singular - "wearing" → present participle - "wore" → past tense
Source: PAF Air Force Commission Past Paper
Q452: Correction: He gave me many advices.
Correct Answer: (B) He gave me many pieces of advice
The word "advice" is uncountable.So the correct form is "pieces of advice" to indicate multiple suggestions.
Source: PAF Air Force Commission Past Paper
Q453: Antonyms of SLOWLY.
Correct Answer: (A) Quickly
SLOWLY. آہستہ آہستہ.Quickly جلدی سے
Source: PAF Air Force Commission Past Paper
Q454: The synonym of BREVITY is?
Correct Answer: (C) Shortness
Brevity: قلت یا کمیShortness: قلت یا کمی
Source: PAF Air Force Commission Past Paper
Q455: I asked him ?help.
Correct Answer: (C) For
- The verb "ask", when followed by a request, uses the preposition "for".- You ask someone for something.Structure: Subject + ask + person + for + thing
Source: PAF Air Force Commission Past Paper
Q456: The Antonym of Expensive is?
Correct Answer: (C) Cheap
Expensive means مہنگاCheap means سستا
Source: PAF Air Force Commission Past Paper
Q457: We get up early ?the morning .
Correct Answer: (D) In
We generally use in before morningWe use "in the morning" to refer to time of day like in the afternoon, in the evening .
Source: PAF Air Force Commission Past Paper
Q458: A mechanical appliance which can work on ?principle is a hydraulic system.
Correct Answer: (B) Pascal's
A hydraulic system works on Pascal's principle, which states that pressure applied to a confined fluid is transmitted equally in all directions.This principle is used in devices like hydraulic lifts and brakes.
Source: PAF Air Force Commission Past Paper
Q459: Which one among the following is a quick source of energy?
Correct Answer: (B) Glucose
Glucose is a simple sugar that is rapidly absorbed and used by the body for immediate energy.It is the quickest source of energy during physical or mental activity.
Source: PAF Air Force Commission Past Paper
Q460: Pepsin is an enzyme that digests ?.
Correct Answer: (A) Proteins
Pepsin is a digestive enzyme that breaks down proteins into smaller peptides and amino acids. It is produced in the stomach and is activated by hydrochloric acid. Pepsin is essential for the digestion of protein-rich foods, including meat, poultry, fish, eggs, and dairy products.
Source: PAF Air Force Commission Past Paper
Q461: The respiratory surface of human is ?
Correct Answer: (C) Alveoli
The respiratory surface, where gas exchange occurs, is the alveoli.Alveoli are tiny sacs located at the end of the bronchioles, deep in the lungs.They provide a large surface area for the exchange of oxygen and carbon dioxide between the lungs and the bloodstream.
Source: PAF Air Force Commission Past Paper
Q462: The food chain always starts from ?
Correct Answer: (A) Producers
A food chain always begins with producers.It usually green plants or algae, that make their own food through photosynthesis.They provide the initial energy source for all other organisms consumers and decomposers in the food chain.
Source: PAF Air Force Commission Past Paper
Q463: In all plants, the major sites of photosynthesis are----.
Correct Answer: (A) Leaves
All important questions and Information Related to 'Photosynthesis"Photosynthesis takes place in presence of the following light Only in sunlight from the sunPhotosynthesis takes place faster in white lightPhotosynthesis occurs more in blue and red light raysPhotosynthesis occurs more in blue and red light rays and less, or not at all, in green light rays.Green Light light is more important for photosynthesis.As compared to photosynthesis, glucose is chiefly decomposed during RespirationAt the time of a Solar Eclipse, the rate of photosynthesis will: DecreaseIn all plants, the major sites of p
Source: PAF Air Force Commission Past Paper
Q464: The name of the scientist who proposed extension of cell theory is?
Correct Answer: (C) Rudolf Virchow
Rudolf Virchow was a German physician, anthropologist, pathologist, prehistorian, biologist, writer, editor, and politician.
Source: PAF Air Force Commission Past Paper
Q465: All are postulates of cell theory except?
Correct Answer: (B) Cell does not contain the hereditary material
The correct answer is: Cell does not contain the hereditary material.The cell theory postulates:All living organisms are made up of one or more cells.The cell is the fundamental unit of life.New cells are derived from pre-existing cells biogenesis .
Source: PAF Air Force Commission Past Paper
Q466: Cell theory was given by ?
Correct Answer: (C) Both A and B
The cell was first coined by an English scientist Robert Hooke in the year 1665. Later the cell theory was given by Matthias Schleiden and Theodor Schwann.
Source: PAF Air Force Commission Past Paper
Q467: F = kx is the mathematical expression of:?
Correct Answer: (B) Hooke’s law
Hooke's law states that the applied force F equals a constant k times the displacement or change in length x, or F = kx.
Source: PAF Air Force Commission Past Paper
Q468: Glycolysis converts?
Correct Answer: (A) Glucose into pyruvate
Glucose, also called dextrose, one of a group of carbohydrates known as simple sugars
Source: PAF Air Force Commission Past Paper
Q469: Glycolysis is ……..
Correct Answer: (B) Takes place in Cytoplasm
Glycolysis, the metabolic pathway that converts glucose into pyruvateTakes place in the cytoplasm specifically the cytosol of both prokaryotic and eukaryotic cells. It acts as the initial stage of cellular respiration, occurring independently of oxygen to produce a net gain of 2 ATP and 2 NADH molecules. Additional Products: Generates 2 NADH.
Source: PAF Air Force Commission Past Paper
Q470: The process of removing salts and other impurities from seawater to make it suitable for drinking and irrigation is called?
Correct Answer: (D) Water Desalination
Desalination is the process by which the dissolved mineral salts in water are removed.
Source: PAF Air Force Commission Past Paper
Q471: Antonym of Lovely is?
Correct Answer: (B) Horrible
- Lovely = خوبصورت، پیارا - Horrible = خوفناک، برا، بھیانک
Source: PAF Air Force Commission Past Paper
Q472: Potential energy of Mass M at Height H is?
Correct Answer: (A) mgh
Potential energy PE = m × g × h, where: - m = mass kg - g = acceleration due to gravity 9.8 m/s² - h = height m
Source: PAF Air Force Commission Past Paper
Q473: Which gate gives output 1 if any input is 1?
Correct Answer: (A) OR gate
The OR gate gives an output of 1 if any of its inputs are 1. This behavior is described by the Boolean expression Y = A + B, Where Y is the output and A and B are the inputs. In other words, for the output to be 0, all inputs must be 0; otherwise, the output is 1.
Source: PAF Air Force Commission Past Paper
Q474: The Fermi level in an intrinsic semiconductor lies?
Correct Answer: (C) In the middle of the valence and conduction bands
In an intrinsic semiconductor, there are equal numbers of electrons in the conduction band and holes in the valence bandSo the Fermi level, which represents the energy level at which the probability of finding an electron is 50%Lies right in the middle of the band gap between the valence and conduction bands.
Source: PAF Air Force Commission Past Paper
Q475: The work done in moving a charge in a closed loop in a magnetic field is ?
Correct Answer: (A) Zero
The work done by a magnetic field in moving a charge along a closed loop is zero, Because the magnetic force on the charge is always perpendicular to its velocity, And therefore perpendicular to its displacement, resulting in zero work done.
Source: PAF Air Force Commission Past Paper

PRACTICE OMR ANSWER BUBBLE SHEET

Use a black/blue ballpoint pen to shade the appropriate circle completely.

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Q471 A B C D
Q472 A B C D
Q473 A B C D
Q474 A B C D
Q475 A B C D