JEE Main 2023ChemistrySome Basic Concepts of ChemistryEasyMCQ

JEE Main 2023 — Some Basic Concepts of Chemistry Question with Solution

JEE Main 2023 (10 Apr Shift 1)

Question

The number of molecules and moles in 2.8375 litres of O2 at STP are respectively

Choose an option

Show full solutionCorrect option: D
Correct answer
D7.527×1022 and 0.125 mol

Step-by-step explanation

One mole of any ideal gas occupies 22.7L at standard temperature and pressure.

The number of moles =Given volumeVolume at STP

Moles =2.837522.7=0.125

The number of molecules =moles×NA

Molecules =0.125×6.022×1023

=7.527×1022

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About this question

This is a previous-year question from JEE Main 2023, covering the Some Basic Concepts of Chemistry 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.