Physics · JEE

Kinetic Theory of Gases Concepts for JEE

32+ syllabus-aligned questions available

Quick answer

Master Kinetic Theory of Gases by understanding definitions, standard results, and typical JEE question patterns — then practise with syllabus-aligned MCQs on Goodmarks.

Build clear conceptual foundations for Kinetic Theory of Gases before speed practice. This guide covers what JEE expects and how to test yourself with MCQs.

Concept explainer

Concept overview for Kinetic Theory of Gases covering 5 JEE syllabus subtopics including Equation of state of a perfect gas, work done on compressing a gas, Kinetic theory of gases: assumptions, the concept of pressure, kinetic interpretation of temperature, RMS speed of gas molecules, degrees of freedom.

Key points

Understand the definition and scope of Equation of state of a perfect gas, work done on compressing a gas in the JEE syllabus
Memorise key formulas and standard results linked to Equation of state of a perfect gas, work done on compressing a gas
Practise 20–40 syllabus-aligned MCQs with step-by-step solutions
Understand the definition and scope of Kinetic theory of gases: assumptions, the concept of pressure, kinetic interpretation of temperature in the JEE syllabus
Memorise key formulas and standard results linked to Kinetic theory of gases: assumptions, the concept of pressure, kinetic interpretation of temperature
Practise 20–40 syllabus-aligned MCQs with step-by-step solutions

JEE tips

Revise Equation of state of a perfect gas, work done on compressing a gas with a one-page formula sheet before attempting mixed tests
After each practice set, log mistakes specific to Equation of state of a perfect gas, work done on compressing a gas and reattempt after 48 hours
Revise Kinetic theory of gases: assumptions, the concept of pressure, kinetic interpretation of temperature with a one-page formula sheet before attempting mixed tests
After each practice set, log mistakes specific to Kinetic theory of gases: assumptions, the concept of pressure, kinetic interpretation of temperature and reattempt after 48 hours

Common trap

Students often rush Equation of state of a perfect gas, work done on compressing a gas questions without checking units, sign conventions, or boundary conditions — always verify assumptions before calculating.

JEE Formula Sheet

6+ important formulas for Kinetic Theory of Gases

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Subtopics in Kinetic Theory of Gases

View Kinetic Theory of Gases formula sheet — 6+ JEE formulas

Free sample questions

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Q1PhysicsUnit 9: Kinetic Theory of Gases

In Maxwell's velocity distribution curve area under the graph

Q2PhysicsUnit 9: Kinetic Theory of Gases

A gas has an average speed of

10 \mathrm{m} / \mathrm{s}

and a collision frequency of

10 s^{-1} .

What is its mean free path?

Q3PhysicsUnit 9: Kinetic Theory of Gases

Assertion Vibrational energy of diatomic molecule corresponding to each degree of freedom is

k_{B} T

Reason For every molecule, vibrational degree of freedom is 2

Q4PhysicsUnit 9: Kinetic Theory of Gases

A sample of

O_{2}

gas and a sample of hydrogen gas both have the same no. of moles, the same volume and same pressure. Assuming them to be perfect gases, the ratio of temperature of oxygen gas to the temperature of hydrogen gas is :

Q5PhysicsUnit 9: Kinetic Theory of Gases

If for a gas

\frac{\boldsymbol{R}}{\boldsymbol{C}_{\boldsymbol{v}}}=\mathbf{0 . 6 7},

then the gas is made up of molecules which are :

Q6PhysicsUnit 9: Kinetic Theory of Gases

Equal masses of

\mathrm{N}_{2}

and

\mathrm{O}_{2}

gases are filled in vessels

A

and

B

. The volume of vessel B is double of A. The ratio of pressure in vessel

A

and

B

will be

Q7PhysicsUnit 9: Kinetic Theory of Gases

In a gas equation,

P V=R T, V

refers to the volume of:

Q8PhysicsUnit 9: Kinetic Theory of Gases

According to Charles law,

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Frequently asked questions

What concepts in Kinetic Theory of Gases are essential for JEE?

Focus on core ideas across Equation of state of a perfect gas, work done on compressing a gas, Kinetic theory of gases: assumptions, the concept of pressure, kinetic interpretation of temperature, RMS speed of gas molecules, degrees of freedom, Law of equipartition of energy and applications to specific heat capacities of gases, and more. JEE tests application, not just memorisation.