JEE Main 2018PhysicsKinetic Theory of GasesMediumMCQ

JEE Main 2018 — Kinetic Theory of Gases Question with Solution

JEE Main 2018 (16 Apr Online)

Question

Two moles of helium are mixed with n moles of hydrogen. If CpCv=32 for the mixture then the value of n is,

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Show full solutionCorrect option: C
Correct answer
C2

Step-by-step explanation

γmix=1+2fmix

CpCv= fmix+2fmix=32

⇒   fmix=4

fmix= n1f1+ nf2n1+ n2

⇒4=2×3+n×52+n

⇒n=2 mole

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About this question

This is a previous-year question from JEE Main 2018, 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.