Photochemical smog is a resultant of the reaction among
A$\mathrm{NO}_2$, $\mathrm{O}_3$ and peroxyacetyl nitrate in the presence of sunlight
BCO, $\mathrm{O}_2$ and peroxyacetyl nitrate in the presence of sunlight
CCO, $\mathrm{CO}_2$ and $\mathrm{NO}_2$ at low temperature
Dhigh concentration of $\mathrm{NO}_2$, $\mathrm{O}_3$ and CO in the evening
Answer & Solution
Correct answer: A. $\mathrm{NO}_2$, $\mathrm{O}_3$ and peroxyacetyl nitrate in the presence of sunlight
UPSC CSE Prelims 2013 (GS-I, Set A), Q.49. Official answer key: A.
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