JEE Main 2019PhysicsKinetic Theory of GasesMediumMCQ

JEE Main 2019Kinetic Theory of Gases Question with Solution

JEE Main 2019 (12 Apr Shift 1)

Question

Two moles of helium gas is mixed with three moles of hydrogen molecules (taken to be rigid). What is the molar specific heat of mixture at constant volume? R=8.3 J/mol K

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Show full solutionCorrect option: A
Correct answer
A17.4 J/mol K

Step-by-step explanation

Cvmix=n1Cv1+n2Cv2n1+n2=232R+352R2+3
=3R+152R5=2110R=17.4 J/mol K

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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.