Q 21: Which is not take part in global warming?
(A) Cabon dioxide
(B) Oxides of sulphur and Nitrogen
(C) Methane
(D) Water Vapour
Ans: Oxides of sulphur and Nitrogen
Q 22: Which air pollutant responsible for acid rain?
(A) Methane
(B) Nitrous Oxide and Sulphur Dioxide
(C) Carbon Monoxide
(D) Carbon Dioxide
Ans: Nitrous Oxide and Sulphur Dioxide