Question:
Which from following gases causes the depletion of ozone layer in upper atmosphere?
Which from following gases causes the depletion of ozone layer in upper atmosphere?
Show Hint
CFCs and Nitrogen oxides (NO) are the two major classes of ozone-depleting substances.
Updated On: Apr 30, 2026
- NO
- NO$_2$
- N$_2$O
- N$_2$O$_5$
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The Correct Option is A
Solution and Explanation
Step 1: Concept
Ozone depletion in the stratosphere is caused by substances that react with $O_3$ molecules.
Step 2: Analysis
Nitric oxide ($NO$) released from supersonic jets reacts directly with ozone:
$NO + O_3 \rightarrow NO_2 + O_2$
Step 3: Conclusion
Nitric oxide (NO) is a primary contributor to nitrogen-based ozone depletion.
Final Answer: (A)
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