Kinetic Theory is a Class 11 Physics chapter that carries about 2.8% of the Physics questions in NEET. Practise it with 39 questions covering 2 topics, each with an explanation.
Sets of 15 questions that adapt to your level, with an explanation for every answer.
Across the 13 previous year papers, Kinetic Theory had 16 questions, about 1.2 a year. The most in one paper was 3, in NEET 2020.
| Paper | Questions from this chapter |
|---|---|
| NEET 2026 | 1 |
| NEET 2025 | 2 |
| NEET 2024 | 0 |
| NEET 2023 | 1 |
| NEET 2022 | 1 |
| NEET 2021 | 1 |
| NEET 2020 | 3 |
| NEET 2019 | 1 |
| NEET 2018 | 1 |
| NEET 2017 | 1 |
| NEET 2016 | 1 |
| Re-AIPMT 2015 | 2 |
| AIPMT 2014 | 1 |
8 questions from the practice bank, spread across the chapter's topics. The full set is in the app.
The number of molecules in one mole of a gas is given by:
Answer: A. Avogadro's number, 6.022 × 10²³
Why: One mole of any substance contains 6.022 × 10²³ elementary entities.
The total translational kinetic energy of 1 mol of an ideal gas at 300 K is about (R = 8.31 J/mol K):
Answer: D. 3.74 kJ
Why: E = (3/2)RT = 1.5 × 8.31 × 300 ≈ 3740 J.
Boyle's law, PV = constant at constant temperature, can be derived from the kinetic theory because:
Answer: A. the mean kinetic energy, and hence P × V, depends only on temperature
Why: From P = ⅓ρv² and the fact that the kinetic energy is fixed by T, PV = ⅔ × (total kinetic energy) is constant at fixed T.
At ordinary temperatures a diatomic gas molecule has how many degrees of freedom?
Answer: A. 5
Why: Three translational and two rotational; vibrational modes are not excited at room temperature.
In a good vacuum, the mean free path of molecules becomes:
Answer: A. larger than the dimensions of the container
Why: Molecules then collide mostly with the walls and rarely with each other.
The rms speed of oxygen molecules (M = 32 g/mol) at 300 K is about (R = 8.31 J/mol K):
Answer: C. 483 m/s
Why: v = √(3RT/M) = √(3 × 8.31 × 300/0.032) ≈ 483 m/s.
The mean free path of the molecules of air at normal temperature and pressure is of the order of:
Answer: B. 10⁻⁷ m
Why: This is much larger than the molecular diameter, which is about 10⁻¹⁰ m.
The ratio Cp/Cv for a monatomic ideal gas is:
Answer: A. 5/3
Why: For f = 3, γ = 1 + 2/f = 5/3.
Kinetic Theory carries about 2.8% of the Physics questions in NEET. Across the 13 previous year papers on NeetVictory it appeared 16 times, about 1.2 questions a year.
Kinetic Theory is a Class 11 Physics chapter in the NCERT syllabus.
NeetVictory has 39 practice questions on Kinetic Theory, each with an explanation, in sets of 15 that adapt to your level. This page shows a free sample.
NeetVictory