JEE Main 2019PhysicsKinetic Theory of GasesEasyMCQ

JEE Main 2019 — Kinetic Theory of Gases Question with Solution

JEE Main 2019 (09 Jan Shift 1)

Question

A mixture of 2 moles of helium gas (atomic mass = 4u) , and 1 mole of argon gas (atomic mass = 40 u) is kept at 300 K in a container. The ratio of their rms speeds VrmsheliumVrms(argon), is close to:

Choose an option

Show full solutionCorrect option: D
Correct answer
D3.16

Step-by-step explanation

VRMS=3RTM

∴ (VRMS)He(VRMS)Ar=MArMHe=404=10= 3.16

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About this question

This is a previous-year question from JEE Main 2019, 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.