Multiple choice

Which of the following is/are not a component(s) of photochemical smog?

  1. Unsaturated hydrocarbons

  2. Nitrogen dioxide

  3. Ozone

  4. Sulphur dioxide

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Photochemical smog is mainly composed of ozone, nitrogen dioxide and volatile organic compounds. Sulphur dioxide is not a component of photochemical smog.