Question

Which of the followings is incorrect about photochemical smog –

• A. It is produced in warm, dry and sunny climate
• B. It is oxidizing in nature.
• C. Ozone gas is one of its constituents.
• D. It is formed in stratosphere.

Answer 1

The correct option is D

It is formed in stratosphere.

Photochemical smog is fomed in troposphere not in stratosphere. It is produced in warm, dry and sunny climate. Its main constituents are $O_3$, $N{O}_2$ and unsaturated carbons. Ozone is formed due to reaction between $N{O}_2$ and atmospheric oxygen.

$N{O}_2\left(g\right)\stackrel{UV}{\to }NO\left(g\right)+O\left(g\right)$

$O\left(g\right)+O_2\left(g\right)\to O_3\left(g\right)$