JEE Main 2021ChemistryHydrogenEasyMCQ

JEE Main 2021 — Hydrogen Question with Solution

JEE Main 2021 (24 Feb Shift 2)

Question

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: Hydrogen is the most abundant element in the Universe, but it is not the most abundant gas in the troposphere.

Reason R: Hydrogen is the lightest element.

In the light of the above statements, choose the correct answer from the options given below:

Choose an option

Show full solutionCorrect option: B
Correct answer
BBoth A and R are true and R is the correct explanation of A

Step-by-step explanation

Most abundant gas in the atmosphere is hydrogen. It is the primary gas present in the stars. Hydrogen fuses to Helium and it fuels the stars.

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About this question

This is a previous-year question from JEE Main 2021, covering the Hydrogen 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.