Question

What is smog? How is classical smog different from photochemical smog?

Answer 1

Smog is a kind of air pollution. It is the blend of smoke and fog. There are two kinds of smog:

a) Classical smog

b) Photochemical smog

The two smogs can be differentiated as follows:

	Classical smog	Photochemical smog
Occurrence	It occurs in a cool, humid climate.	It occurs in a dry, sunny climate.
Components	Smoke, fog, and sulphurdioxide.	PAN, acrolein, ozone, formaldehyde, nitric oxide.
Nature	It is reducing in nature	It is oxidizing in nature.