JEE Main 2021PhysicsKinetic Theory of GasesEasyMCQ

JEE Main 2021 — Kinetic Theory of Gases Question with Solution

JEE Main 2021 (27 Aug Shift 2)

Question

If the R.M.S. speed of oxygen molecules at 0°C is 160 m s-1. Find the R.M.S. speed of hydrogen molecules at 0°C.

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Show full solutionCorrect option: C
Correct answer
C640 m s-1

Step-by-step explanation

Recall the formula of root mean square speed, vRMS=3RTM, 

⇒vRMSO2 vRMSH2=MH2 MO2=232=14

⇒vRMSH2=4 vRMSO2=4×160=640 m s-1

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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.