GyanGram
ATTEMPT · ENVIRONMENT · PRELIMS 2013
Photochemical smog is a resultant of the reaction among -
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Photochemical smog is a resultant of the reaction among -
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• Correct Answer: A
• Photochemical smog forms when NO₂ photolyzes under UV sunlight to produce O₃; reactions with organic radicals yield peroxyacetyl nitrate (PAN).
• B is wrong: CO is not a primary precursor. C is wrong: Low temperatures inhibit photochemical reactions. D is wrong: Evening lacks sufficient sunlight for photolysis.
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