Question:medium

Which of the following is not the common component of photochemical smog?

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Remember the two main types of smog and their key components: 1. \textbf{Photochemical Smog (oxidizing):} Primary pollutants are NOx and VOCs. Secondary pollutants are Ozone (\(O_3\)), PAN, aldehydes (Formaldehyde, Acrolein). Needs sunlight. 2. \textbf{Classical Smog (reducing):} Primary pollutant is Sulphur Dioxide (\(SO_2\)). Needs cool, humid conditions.

Updated On: Mar 30, 2026

Ozone
Formaldehyde
Acrolein
Sulphur dioxide

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The Correct Option is D

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