Question

Acid rain is caused by or recent reports of acid rain in some industrial cities are due to the effect of atmosphere pollution by
A. Excessive release of `CO_2` by burning of fuels like wood and charcoal, cutting of forests and increased animal population
B. Excessive release of `NO_2` and `SO_2` in atmosphere by burning of fossil fuel
C. Excessive release of `NH_3` by industrial plants and coal gas
D. Excessive release of CO in atmosphere by incomplete combustion of coke, charcoal and other carbonaceous fuel in paucity of oxygen

Answer 1

Correct Answer - B
When `SO_2` pollution in air is much higher . Sometimes , `SO_2` mixes in the air with small particles of metals near the factories and gets oxidised into sulphur trioxide `SO_3`.These gases are harmful and they react with water to form sulphuric acid `(H_2SO_4)` or sulphurous acid `(H_2SO_3)` and come down to earth with rain water, it is called acid rain or acid precipitation