Question

Photochemical smog occurs in warm, dry and sunny climate. One of the following is not amongst the components of photochemical smog, identify it.

• A. $NO_2$
• B. $O_3$
• C. $SO_2$
• D. Unsaturated hydrocarbon

Answer 1

Answer: (C)

$SO_2$

Answer 2

The smog which is formed in presence of sunlight is called photochemical smog. This occurs in the months of summer when $NO _{2}$ and hydrocarbons are present in large amounts in atmosphere. $SO _{2}$ is not responsible for photochemical smog because concentration of $O _{3}$. PAN, aldehyde and ketones builds up in the atmosphere.