A) Excessive release of\[C{{O}_{2}}\]by burning of fuels like wood and charcoal, cutting of forests and increased animal population
B) Excessive release of \[N{{O}_{2}}\]and \[S{{O}_{2}}\] in atmosphere by burning of fossil fuel
C) Excessive release of \[N{{H}_{3}}\] 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
Correct Answer: B
Solution :
When \[S{{O}_{2}}\]pollution in air is much higher. Sometimes, \[S{{O}_{2}}\] mixes in the air with small particles of metals near the factories and gets oxidised into sulphur trioxide \[S{{O}_{3}}\]. These gases are harmful and they react with water to form sulphuric acid \[\left( {{H}_{2}}S{{O}_{4}} \right)\] or sulphurous acid \[\left( {{H}_{2}}S{{O}_{3}} \right)\] and come down to earth with rain water; it is called acid rain or acid precipitation.
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