Previous year MCQs

General science UPPSC 2002 GS-I
Question

Which one of the following is not responsible for the depletion of ozone layer:

Answer & Solution

Answer: (Detailed Solution Below)

Option D: Nitrous oxide

Detailed Solution:

The correct answer is “Nitrous oxide”.
Nitrous oxide (N₂O) is not responsible for the depletion of the ozone layer. The other options—CFC-12 (chlorofluorocarbon-12), methyl chloroform, and HALON-1211—are all ozone-depleting substances.

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