Question

Photochemical smog is mainly composed of ______.

विकल्प

• CO₂

• PAN and NOx

• SO₂

• ozone, PAN and NOx

Answer 1

Photochemical smog is mainly composed of ozone, PAN and NOx.

Explanation:

Photochemical smog contains secondary pollutants such as ozone, PAN and nitrogen oxides. Carbon dioxide and sulphur dioxide are not its principal components, and the option listing only PAN and NOx omits ozone.