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Indian Navy Pilot Kinetic Theory of Gases — practice questions

Explore 5 free Kinetic Theory of Gases questions in Indian Navy Pilot Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Kinetic Theory of Gases questions and exercises with answers

Showing questions 1–5 of 5.

Internal energy of n moles of ideal gas (monatomic):Read the answer and worked solution →For ideal gas, C_p - C_v =Read the answer and worked solution →In adiabatic process for ideal gas:Read the answer and worked solution →Mean free path doubles when:Read the answer and worked solution →During adiabatic compression of ideal gas:Read the answer and worked solution →

Worked practice questions

Internal energy of n moles of ideal gas (monatomic):

  1. U = (3/2) nRT
  2. U = (5/2) nRT
  3. U = nR
  4. U = nRT
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Correct answer: A. U = (3/2) nRT

**Monatomic:** U = (3/2) nRT. **Diatomic at moderate T:** U = (5/2) nRT. **Triatomic linear:** (5/2)nRT (5 DOF) bent: (3)nRT (6 DOF approximately).

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For ideal gas, C_p - C_v =

  1. R (Mayer's relation)
  2. 0
  3. 2R
  4. R/2
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Correct answer: A. R (Mayer's relation)

**Mayer's relation:** C_p - C_v = R (per mole). Because at constant P, gas does work against piston as it expands. Holds for ideal gas; corrections for real gases.

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In adiabatic process for ideal gas:

  1. PV = constant
  2. PV^γ = constant
  3. PV² = constant
  4. TV = constant
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Correct answer: B. PV^γ = constant

Adiabatic (Q = 0): PV^γ = constant. Also TV^(γ-1) = constant, T^γ P^(1-γ) = constant. Adiabatic compression heats gas (work done on gas all goes to U → T rises).

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