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Question
Photochemical smog occurs in warm, dry and sunny climate. One of the following is not amongst the components of photochemical smog, identify it.
Options
NO2
O3
SO2
Unsaturated hydrocarbon
Solution
SO2
Explanation:
The smog which is formed in the presence of sunlight is called photochemical smog. This occurs in the months of summer when NO2 and hydrocarbons are present in large amounts in the atmosphere. Concentration of O3, PAN, aldehydes and ketones increases up in the atmosphere. SO2 is not responsible for photochemical smog.
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Assertion (A): Photochemical smog is oxidising in nature.
Reason (R): Photochemical smog contains NO2 and O3, which are formed during the sequence of reactions.
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