Photochemical smog occurs in warm, dry and sunny climate. One of the following is not amongst the components of photochemical smog, identify it.
(i) NO_{2}
(ii) O_{3}
(iii) SO_{2}
(iv) Unsaturated hydrocarbon

Answers (1)

The answer is the option (iii) SO_{2}

Explanation: When NO and hydrocarbons are present in large amounts in the atmosphere in the presence of sunlight in summer, photochemical smog is formed. SO_{2} is not responsible for the formation of photochemical smog.

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