Which of the followings is incorrect about photochemical smog

Discussion Forum : Environmental Chemistry

Question -

Which of the followings is incorrect about photochemical smog –

Options:

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: Option D
:
D

Photochemical smog is formed in troposphere not in stratosphere. It is produced in warm, dry and sunny climate. It's main constituents are $O_{3}, N O_{2}$ and unsaturated carbons. Ozone is formed due to reaction between $N O_{2}$ and atmospheric oxygen.
$N O_{2} (g) u v - \to N O (g) + O (g)$
$O (g) + O_{2} (g) \to O_{3} (g)$

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