Question

Photochemical smog is formed by

• A. Nitrogen oxide
• B. Hydrocarbons
• C. Nitrogen oxide and hydrocarbons
• D. Solar radiations upon nitrogen oxide and hydrocarbons

Answer 1

The correct option is D Solar radiations upon nitrogen oxide and hydrocarbons

The photochemical smog refers to the smog which contains a high concentration of NO${}_x$, ozone and other volatile compounds. The photochemical smog contains highly reactive species like NO${}_x$, hydrocarbons and ozone which can produce reactive radicals on reaction with sunlight. This cause destruction of the chlorophyll pigments, blazing and bleaching of the leaves and other parts of the plants.

Thus, the correct answer is option D.