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KCET Kinetic Theory of Gases — practice questions — page 2

Explore 76 free Kinetic Theory of Gases questions in KCET 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 31–60 of 76.

Boltzmann's distribution gives fraction of molecules in energy state E:Read the answer and worked solution →During adiabatic compression of ideal gas:Read the answer and worked solution →For an ideal gas in adiabatic process: TV^(γ-1) =Read the answer and worked solution →Kinetic energy per molecule of monatomic gas at 300 K (k = 1.38 × 10⁻²³):Read the answer and worked solution →Two containers, equal volume, one with H₂ and one with O₂ at same T, P. Ratio of:Read the answer and worked solution →For ideal gas, molar heat capacity C_v vs C_p relationship:Read the answer and worked solution →Speed of sound in ideal gas:Read the answer and worked solution →NEET · Physics · Kinetic Theory — SortRead the answer and worked solution →Pick the bigger gas quantityRead the answer and worked solution →The ideal gas equationRead the answer and worked solution →Constants of the gas lawsRead the answer and worked solution →When real gases obey the equationRead the answer and worked solution →Pressure from molecular motionRead the answer and worked solution →Reading the pressure relationRead the answer and worked solution →What temperature measuresRead the answer and worked solution →Which moves fasterRead the answer and worked solution →Odd one out: kinetic theoryRead the answer and worked solution →Law of equipartitionRead the answer and worked solution →Equipartition, checkedRead the answer and worked solution →Mode to energyRead the answer and worked solution →Specific heats from equipartitionRead the answer and worked solution →Mean free pathRead the answer and worked solution →Free path and collisionsRead the answer and worked solution →Who proposed whatRead the answer and worked solution →Odd one out: the gas lawsRead the answer and worked solution →True of gasesRead the answer and worked solution →Forces between moleculesRead the answer and worked solution →Symbol to meaningRead the answer and worked solution →Translational kinetic energyRead the answer and worked solution →Odd one out: what changesRead the answer and worked solution →

Worked practice questions

Boltzmann's distribution gives fraction of molecules in energy state E:

  1. ∝ exp(-E/kT)
  2. 1/E
  3. Linear in E
  4. Independent of T
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Correct answer: A. ∝ exp(-E/kT)

**Boltzmann factor:** P(E) ∝ exp(-E/kT). High-energy states exponentially less populated. Foundation of statistical mechanics, semiconductor physics, chemical kinetics.

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During adiabatic compression of ideal gas:

  1. T decreases
  2. T constant
  3. Random
  4. T INCREASES (work done on gas → internal energy → T rises)
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Correct answer: D. T INCREASES (work done on gas → internal energy → T rises)

Adiabatic (Q = 0): ΔU = W (work done on gas). Compression means work done ON gas (W > 0). ΔU > 0 → T increases. **Hence rubbing a bike pump heats up (compressing air).**

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For an ideal gas in adiabatic process: TV^(γ-1) =

  1. Always 0
  2. Variable
  3. Constant (derived from PV^γ = const and PV = nRT)
  4. T × V
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Correct answer: C. Constant (derived from PV^γ = const and PV = nRT)

Combine PV^γ = const with PV = nRT: TV^(γ-1) = const, or T^γ P^(1-γ) = const. Used to find final T given V change in adiabatic process.

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