Q.

Acid rain is caused by which of the following gas?

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a

Helium

b

Carbon dioxide

c

Sulphur dioxide

d

Ozone

answer is C.

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Detailed Solution

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  • Acid rain results when sulphur dioxide (SO2) and nitrogen oxides (NOX) are emitted into the atmosphere and transported by wind and air currents. 
  • The SO2 and NOX react with water, oxygen and other chemicals to form sulphuric and nitric acids. 
  • These then mix with water and other materials before falling to the ground.
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