Question

Which one is not a pollutant normally?

• A. hydrocarbon
• B. carbon dioxide
• C. carbon monoxide
• D. sulphur dioxide.

Answer 1

The Correct Option is B

The common gaseous pollutants are oxides of carbon (CO and CO), oxides of nitrogen (NO and NO) oxides of sulphur (SO and S0), all these together contribute 90% of the global air pollution. Out of all these CO is not a pollutant normally, the green plants, by photosynthesis balance the CO and O ratio in the air to a great extent, whereas others like carbon monoxide, NO etc are poisonous gases.