JEE Main 2022ChemistryStates of MatterHardMCQ

JEE Main 2022 — States of Matter Question with Solution

JEE Main 2022 (26 Jun Shift 1)

Question

An evacuated glass vessel weighs 40.0 g when empty, 135.0 g when filled with a liquid of density 0.95 g mL-1 and 40.5 g when filled with an ideal gas at 0.82 atm at 250 K. The molar mass of the gas in gmol-1 is : (Given : R=0.082 L atmK-1mol-1)

Choose an option

Show full solutionCorrect option: D
Correct answer
D125

Step-by-step explanation

Weight of gas =40.5-40=0.5 g

Mass of liquid =135.5-40=95 g.

Volume of glass vessel =95.0 g0.95 g/ml

=100ml.

∴ PV=WMRT

0.82 atm100×10-3=0.5M0.082250

M=125 g/mol

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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.