JEE Main 2015 Chemistry question

Not in JEE Main or NEET syllabus

Photochemical smog consists of excessive amount of X, in addition to aldehydes, ketones, peroxy acetyl nitrile (PAN). X is:

(1)
(2)
(3)Correct
(4)CO

Answer: (3)

Solution

Photochemical (oxidising, or Los Angeles) smog forms in warm, dry, sunny conditions when nitrogen oxides and unburnt hydrocarbons from vehicle exhaust undergo photochemical reactions. Sunlight dissociates into NO and atomic oxygen, which combines with to give ozone. The

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Question ID VK-115267