JEE Main 2021PhysicsKinetic Theory of GasesEasyMCQ

JEE Main 2021 — Kinetic Theory of Gases Question with Solution

JEE Main 2021 (27 Jul Shift 1)

Question

The number of molecules in one litre of an ideal gas at 300 K and 2 atmospheric pressure with mean kinetic energy 2×10-9 J per molecule is:

Choose an option

Show full solutionCorrect option: C
Correct answer
C1.5×1011

Step-by-step explanation

KE=32kT
PV=NNART
N=PVkT
=N=1.5×1011

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About this question

This is a previous-year question from JEE Main 2021, covering the Kinetic Theory of Gases chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.