JEE Main 2022ChemistryStates of MatterMediumNumerical

JEE Main 2022 — States of Matter Question with Solution

JEE Main 2022 (24 Jun Shift 2)

Question

At 300 K, a sample of 3.0 g of gas A occupies the same volume as 0.2 g of hydrogen at 200 K at the same pressure. The molar mass of gas A is g mol-1. (nearest integer) Assume that the behaviour of gases as ideal. (Given: The molar mass of hydrogen H2 gas is 2.0 g mol-1.)

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Show full solutionCorrect answer: 45
Correct answer
45

Step-by-step explanation

PV=nRTV=nRTPVH2=VA (Given)

nRTPA=nRTPH2

3×300MA=0.22×200

Hence, the molar mass of A, MA=45g

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About this question

This is a previous-year question from JEE Main 2022, covering the States of Matter chapter of Chemistry. 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.