NEET Physics / AI question bank / NCERT Class 11 / Kinetic Theory of Gases
Kinetic Theory: NEET questions with solutions
NEET uses this chapter for the average kinetic energy (3/2)k_BT, rms speeds and their ratios, P = ⅓nm⟨v²⟩ and PV = ⅔E, Dalton's law, equipartition with C_v, C_p and γ for different gases and mixtures, and the mean free path. Marks are lost by using grams per mole in v_rms, Celsius instead of kelvin, and thinking heavier molecules carry more kinetic energy at the same temperature.
Also called: kinetic theory of gases · KTG · ideal gas
Questions
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- Q1The average translational kinetic energy of a molecule of an ideal gas at 300 K is (k_B = 1.38 × 10⁻²³ J K⁻¹)
Kinetic interpretation of temperatureEasySingle correct
- Q2A sealed flask holds a mixture of hydrogen (H₂) and oxygen (O₂) gases in thermal equilibrium. How do the average translational kinetic…
Kinetic interpretation of temperatureEasySingle correct
- Q3A bicycle pump's outlet is blocked and its piston is pushed in slowly, so the trapped air stays at room temperature. Evaluate the Assertion…
Pressure of an ideal gas from molecular impactsEasyAssertion–Reason
- Q4At what temperature will hydrogen molecules (molar mass 2 g mol⁻¹) have the same rms speed as oxygen molecules (molar mass 32 g mol⁻¹) have…
Kinetic interpretation of temperatureMediumSingle correct
- Q5Find the rms speed of helium atoms (molar mass 4.0 g mol⁻¹) at 127 °C. Take R = 8.31 J mol⁻¹ K⁻¹.
Kinetic interpretation of temperatureMediumSingle correct
- Q6One mole of a monatomic ideal gas is mixed with one mole of a rigid diatomic ideal gas. The ratio of specific heats γ = C_p/C_v of the…
Specific heats of gasesHardSingle correct
- Q7A 20.0 L vessel at 300 K contains 0.50 mol of O₂ and 1.50 mol of N₂, which do not react. Take R = 8.31 J mol⁻¹ K⁻¹. The partial pressure of…
Dalton's law of partial pressuresMediumSingle correct
- Q8Using the law of equipartition of energy, match each substance in List I with its molar specific heat at constant volume in List II.
Degrees of freedom and equipartitionMediumMatch the following
- Q9Gas molecules move fast, yet a smell spreads slowly across a room because each molecule travels only a short distance between collisions.…
Mean free pathMediumStatement based
- Q10Oxygen gas fills a 2.0 L container at a pressure of 1.5 × 10⁵ Pa. Treating it as an ideal gas, the total translational kinetic energy of all…
Pressure of an ideal gas from molecular impactsHardSingle correct
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