Question

Which of the following is an air pollutant?

• A. Nitrogen
• B. Carbon dioxide
• C. Carbon monoxide
• D. Oxygen

Answer 1

The correct option is C

Carbon monoxide

Explanation for correct option:

Option C

Pollutant:

• The harmful and undesirable substances mixed in the air are called pollutants.
• Air gets polluted by smoke, dust, and coke emitted by running automobiles and chimneys of industries.
• Some common air pollutants are gases like sulphur dioxide (${\mathrm{SO}}_2$), carbon monoxide ($\mathrm{CO}$), and nitrogen oxides (${\mathrm{NO}}_2$).

Therefore, option C is correct.