JEE Main 2021ChemistryEnvironmental ChemistryMediumMCQ

JEE Main 2021 — Environmental Chemistry Question with Solution

JEE Main 2021 (25 Jul Shift 2)

Question

Given below are two statements :
Statement I : Chlorofluoro carbons breakdown by radiation in the visible energy region and release chlorine gas in the atmosphere which then reacts with stratospheric ozone.

Statement II : Atmospheric ozone reacts with nitric oxide to give nitrogen and oxygen gases, which add to the atmosphere.

For the above statements choose the correct answer from the options given below :

Choose an option

Show full solutionCorrect option: B
Correct answer
BBoth statement I and II are false

Step-by-step explanation

Statement I:

CFCs are broken down by powerful UV radiation and releases chlorine free radical which reacts with ozone and start chain reaction.

Statement II:
Atmosphere ozone reacts with nitric oxide to produce nitrogen dioxide and oxygen.

NO(g)+O3( g)→NO2( g)+O2( g)

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About this question

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