Question:
The compound that is NOT a common component of photochemical smog is :
$\mathrm{O}_{3}$
$\mathrm{CH}_{2}=\mathrm{CHCHO}$
$\mathrm{CF}_{2} \mathrm{Cl}_{2}$
Correct Option: , 4
Solution:
Acrolein, PAN (produced by the oxidation of unburnt hydrocarbons present in the polluted air) and ozone are the main components of photochemical smog. While $\mathrm{CF}_{2} \mathrm{Cl}_{2}$ is not a common component of photochemical smog.