Physics - Kinetic Theory of Gases
Practise 15 WBJEE previous year questions on Kinetic Theory of Gases, compiled from papers spanning 2009 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty WBJEE tests.
Kinetic Theory of Gases has been asked in 14 of the 18 years of WBJEE papers analysed (2009–2026), with 15 questions in all. 53% of them were easy, 47% moderate and 0% tough. Most of its questions came from 2013, with 2 questions that year. In the last three years (2024–2026) it had 3 questions across 3 papers, about 1 per paper.
The chapter's 3 topics are not weighted equally: Speed of Gas (8 questions, 53%), Degree of Freedom and Specific Heat (4 questions, 27%), and Gas Laws (3 questions, 20%) have been asked the most. Speed of Gas has also led over the last five years, with 3 questions.
- 1moles of an ideal gas with are mixed with moles of another ideal gas with . The value of for the mixture is2026Degree of Freedom and Specific Heat
- 2Let denotes the mean speed, root mean square speed and most probable speed of the molecules each of mass in an ideal monoatomic gas at absol2025Speed of Gas
- 3The speed distribution for a sample of gas particles is shown below. for . How many particles have speeds between and ?2024Speed of Gas
- 4Six molecules of an ideal gas have velocities \(1,3,5,5,6\) and \(5 {~m} / {s}\) respectively. At any given temperature, if \( {V}\) and \(V2023Speed of Gas
- 5If pressure of real gas in a container is given by , then the mass of the gas in the container is2021Gas Laws
- 6What will be the molar specific heat at constant volume of an ideal gas consisting of rigid diatomic molecules?2019Degree of Freedom and Specific Heat
- 7One mole of a monoatomic ideal gas undergoes a quasistatic process, which is depicted by a straight line joining points and in a diagram. Wh2018Degree of Freedom and Specific Heat
- 8Temperature of an ideal gas, initially at , is raised by . The rms velocity of the gas molecules will2017Speed of Gas
- 9If the rms velocity of hydrogen gas at a certain temperature is then the ras velocity of oxygen gas at the same temperature is2016Speed of Gas
- 10The rms speed of oxygen is at a particular temperature. If the temperature is doubled and oxygen molecules dissociate into oxygen atoms, the2015Speed of Gas
- 11The r.m.s speed of the molecules of a gas at is The temperature at which the r.m.s. speed will be is2013Speed of Gas
- 123 moles of mono-atomic gas is mixed with 1 mole of a diatomic gas The value of for the mixture will be2013Degree of Freedom and Specific Heat
- 13Air inside a closed container is saturated with water vapour. The air pressure is \( {p}\) and the saturated vapour pressure of water is \( 2011Gas Laws
- 14The temperature of anideal gas is increased from to . If at , the root mean square speed of gas molecules is , then at it will be2010Speed of Gas
- 15The equation of state for moles of an ideal gas is , where is a constant. The SI unit for is2009Gas Laws
Frequently Asked Questions
1.How many questions are available for Kinetic Theory of Gases?
This chapter includes 15 questions compiled from WBJEE papers spanning 2009 to 2026.
2.Are these questions only from WBJEE, or from other exams too?
These are WBJEE questions specifically for the Kinetic Theory of Gases chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.
3.Is Kinetic Theory of Gases an important chapter for WBJEE Physics?
Kinetic Theory of Gases has appeared in 14 of the 18 years of WBJEE papers covered here, with 15 questions across 14 papers - about one per paper it appears in.
4.What is the difficulty level of Kinetic Theory of Gases questions in WBJEE?
Of the 15 questions analysed for this chapter, 53% are easy, 47% moderate and 0% tough. 2013 had the most, with 2 questions.
5.Which topics in Kinetic Theory of Gases should I focus on?
These topics have carried the most weightage in Kinetic Theory of Gases:
- Speed of Gas - 8 questions (53%)
- Degree of Freedom and Specific Heat - 4 questions (27%)
- Gas Laws - 3 questions (20%)
6.Is Kinetic Theory of Gases's weightage in WBJEE going up or down?
Across all 14 papers analysed, Kinetic Theory of Gases has averaged about 1.1 questions per paper. In the last three years (2024–2026), that average has stayed about the same, at about 1.0 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.