20000+ Important MCQs for AIR FORCE

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Learn AIR FORCE MCQs with answers [Page 8 of Department 75]

R

Ram Sharma • 193.88K Points
Coach Physics

71) Which among the given is not characteristic of resonance?

  • (A) The canonical structures have the constituent atoms in the same relative positions
  • (B) They have the same number of unpaired electrons
  • (C) They have nearly the same energy
  • (D) The actual structure can be represented on paper using the conventional symbols
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Correct Answer - Option (D)

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R

Ram Sharma • 193.88K Points
Coach Science

72) All isotopes of the same element have ______

  • (A) different atomic numbers & the same atomic mass
  • (B) different atomic numbers & different atomic mass
  • (C) the same atomic number & the atomic mass
  • (D) the same atomic number but different atomic masses
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Correct Answer - Option (D)

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R

Ram Sharma • 193.88K Points
Coach Science

76) Which among the given is not a chemical action?

  • (A) Burning of paper
  • (B) Conversion of water into steam
  • (C) Digestion of food
  • (D) Burning of coal
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Correct Answer - Option (B)

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R

Ram Sharma • 193.88K Points
Coach Physics

78) The surface of a lake is frozen in severe winter, but the water at its bottom is still liquid. What is the reason?

  • (A) The density of water is maximum at 4°C
  • (B) Ice is a bad conductor of heat
  • (C) Since, the surface of the lake is at the same temperature as the air, no heat is lost
  • (D) None of the statements
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Correct Answer - Option (A)

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R

Ram Sharma • 193.88K Points
Coach Physics

79) Danger signals are generally red as red light

  • (A) gives comfort to eye
  • (B) has lowest velocity
  • (C) undergoes least deviation
  • (D) is least bright
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Correct Answer - Option (C)

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R

Ram Sharma • 193.88K Points
Coach Science

80) When hot-water is sprinkled on a hotter glass tumbler, it breaks as

  • (A) glass suddenly contracts
  • (B) water evaporates
  • (C) glass suddenly expands
  • (D) glass reacts chemically with water
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Correct Answer - Option (A)

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