JEE Main · 2019 · 12 Jan 2019 · Shift 1 · Environmental Chemistry

The molecules that has minimum/no role in the formation of photochemical smog is:

(A) $N_{2}$ ✓ Correct
(B) $CH_{2} = O$
(C) $O_{3}$
(D)NO

Answer: (A)

Solution

Photochemical smog builds up when sunlight drives reactions among oxides of nitrogen and unburnt hydrocarbons, producing ozone, aldehydes such as formaldehyde, and other oxidants. Molecular nitrogen,

N X_{2}

, is extremely unreactive under ordinary atmospheric conditions and is not one of the species taking part, so it has essentially no role in forming the smog.

JEE Main · 2019 · 12 Jan 2019 · Shift 1 · Single correct option

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