OPSC OCS 2021 · Question 54 of 72

On the ozone layer, the CFC has continuing their effects as :

General Studies

AReactions use the CI atoms formed by them leading to the degradation of ozone.
BTheir efficient absorption by water vapours of the atmosphere.
CIn reactions, the CI atoms formed by them serve as catalysts leading to the degradation of ozoneCorrect
DThey are constantly produced in increasing quantities, globally.

Answer: C. In reactions, the CI atoms formed by them serve as catalysts leading to the degradation of ozone

Explanation

Academy for Civil Services Page 44 Chlorine is able to destroy so much of the ozone because it acts as a catalyst. Chlorine initiates the breakdown of ozone and combines with a freed oxygen to create two oxygen molecules.

Source: OPSC OCS Prelims 2021 GS Paper-I; answers per Apti Plus unofficial key

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