Question

Photochemical smog is formed due to presence of

• A. Oxides of sulphur
• B. Oxides of nitrogen
• C. Oxides of carbon
• D. Oxides of lead.

Answer 1

Answer: (B)

Oxides of nitrogen

Answer 2

: Photochemical smog is formed due to photochemical reaction taking place when air contains $NO_{2}$and hydrocarbons.