The molecule that has minimum/no role in the formation of photochemical smog, is :
A
O3
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B
CH2=O
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C
NO
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D
N2
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Solution
The correct option is DN2 Chiefly NO2, O3 and hydrocarbon are responsible for build up smog.Apart from these other compounds which are responsible for photochemical smog is HCHO,O3 and NO