Home Biology Ecosystem Previous Year Questions Photochemical smog pollution does not contain
Biology Ecosystem Previous Year Questions Single Correct MCQ
Published on: August 12, 2026

Photochemical smog pollution does not contain

A
Carbon dioxide
B
PAN (peroxy acyl nitrate)
C
Ozone
D
Nitrogen dioxide

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The correct answer is:
A

Photochemical smog mainly contains ozone, nitrogen dioxide, and PAN, formed by sunlight acting on pollutants. Carbon dioxide is not a main component of photochemical smog.

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