JEE Main 2020PhysicsKinetic Theory of GasesMediumMCQ

JEE Main 2020Kinetic Theory of Gases Question with Solution

JEE Main 2020 (08 Jan Shift 2)

Question

Consider a mixture of n moles of helium gas and 2n moles of oxygen gas (molecules taken to be rigid) as an ideal gas. Its CPCV value will be:

Choose an option

Show full solutionCorrect option: A
Correct answer
A1913

Step-by-step explanation

γmix =n1cp1+n2cp2n1cv1+n2cv2
=n52R+2n72Rn32R+2n52R
=5+143+10=1913

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About this question

This is a previous-year question from JEE Main 2020, 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.