JEE Main · 2004 · 24 Apr 2004 · Offline · Environmental Chemistry

The smog is essentially caused by the presence of

(A) $O_{2}$ and $O_{3}$
(B) $O_{3}$ and $N_{2}$
(C)Oxides of sulphur and nitrogen✓ Correct
(D) $O_{2}$ and $N_{2}$

Answer: (C)

Solution

Ordinary smog is essentially the work of the oxides of sulphur, such as

SO X_{2}

and

SO X_{3}

, together with the oxides of nitrogen, such as

NO

and

NO X_{2}

, thrown out by burning fuel and by industry. These oxides join with moisture and other species in the air to build the acidic haze known as smog, so it is the oxides of sulphur and nitrogen that are responsible.

JEE Main · 2004 · 24 Apr 2004 · Offline · Single correct option

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