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Question

The acids present in acid rain are

A
Peroxyacetylnitrate
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B
H2CO3
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C
HNO3
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D
H2SO4
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Solution

The correct options are
B H2CO3
C HNO3
D H2SO4
Rain water has a pH of 5.6 due to the presence of H+ ions formed by reaction of rain water with carbon dioxide present in the atmosphere.
H2O(l)+CO2(g)H2CO3(aq)
H2CO3(aq)H+(aq)+HCO3(aq)
When the pH of the rain water drops below 5.6, it is called acid rain. SO2 and NO2 after oxidation and reaction with water are major contributors to acid rain,
2SO2(g)+O2(g)+2H2O(l)2H2SO4(aq)
4NO2(g)+O2(g)+2H2O(l)4HNO3(aq)

hence , correct options are (B),(C)and(D).

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