JEE Main · 2019 · 12 Apr 2019 · Shift 2 · Environmental Chemistry

The primary pollutant that leads to photochemical smog is:

(A)acrolein
(B)nitrogen oxides✓ Correct
(C)ozone
(D)sulphur dioxide

Answer: (B)

Solution

Photochemical smog is set off by primary pollutants from vehicle exhaust reacting in sunlight. The initiators are the nitrogen oxides; ozone and PAN are secondary products formed later, and sulphur dioxide belongs to classical smog. So the primary pollutant leading to photochemical smog is nitrogen oxides.

JEE Main · 2019 · 12 Apr 2019 · Shift 2 · Single correct option

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