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Q.

The normal rain water is slightly acidic and its pH value is 5.6 because of which one of the following?

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a

N2O5+H2O→2HNO3

b

CO2+H2O→H2CO3

c

2SO2+O2+2H2O→2H2SO4

d

4NO2+O2+2H2O→4HNO3

answer is A.

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Detailed Solution

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Normal rain water is also acidic and have pH value 5.6 because of formation of carbonic acid.
CO2+H2O→H2CO3

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