UPSC Prelims 2022 – Question 100

Q100. Consider the following:

1. Carbon monoxide
2. Nitrogen oxide
3. Ozone
4. Sulfur dioxide

Excess of which of the above in the environment is/ are the cause(s) of acid rain?
a) 1, 2 and 3
b) 2 and 4 only
c) 4 only
d) 1, 3 and 4

Answer (b)

• The pollutants, Sulphur dioxide, and nitrogen oxide which are released by the burning of coal and petroleum products combine with moisture in ‘the air and rainwater and produce Sulphuric acid and nitric acid respectively and fall along with the rain called acid rain.

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