A) CFCs and dust
B) \[N{{O}_{2}}\]and \[S{{O}_{2}}\]
C) \[N{{O}_{2}},S{{O}_{2}},N{{H}_{3}},{{H}_{2}}S\]and dust
D) \[N{{H}_{3}}\]and \[S{{O}_{2}}\]
Correct Answer: B
Solution :
Acid rain is the precipitation having a pH value of less than about 5.0 which has adverse effect on the fauna and flora, on which it falls. Rainwater has a pH value of 5.6 due to the presence of dissolved \[C{{O}_{2}}\]. Acid rain results from emission into the atmosphere of various pollutant gases, particularly \[S{{O}_{2}}\] and various oxides of nitrogen, which originate from burning of fossil fuel, car exhaust fumes etc. CFCs (Chloro Fluoro Carbons) mainly act as ozone destroyer. Chief source of \[{{H}_{2}}S\] are decaying vegetation and animal matter especially in aquatic habitats. It causes headache, nausea, collapse, coma and finally death.
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