Environmental Pollution — Prelims Questions

Which of the following statements regarding photochemical smog is INCORRECT?

Which of the following is NOT a greenhouse gas?

The phenomenon of 'blue baby syndrome' (methemoglobinemia) is caused by the contamination of drinking water with:

Which of the following statements about the ozone layer and its depletion is correct?

A water sample has a BOD value of $25\,\text{mg/L}$. This indicates that the water is:

Which of the following is a secondary air pollutant?