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In atmosphere, `SO_(2)` and `NO` are oxidised to `SO_(3)` and `NO_(2)`, respectively,w hcih react with water to given `H_(2)SO_(4)` and `HNO_(3)`. The resultant solution is called acid rain. `SO_(2)`dissolves in water to form diprotic acid. `SO_(2)(g) +H_(2)O(l) hArr HSO_(3)^(Theta) + H^(o+), K_(a_(1)) = 10^(-2)`. `HSO_(3)^(Theta) hArr SO_(3)^(2-) + H^(o+), K_(a_(2)) = 10^(-7)` and for equilibrium, `SO_(2)(aq) + H_(2)O (l) hArr SO_(3)^(2-)(aq) +2H^(o+)(aq)` `K_(a) = K_(a_(1)) xx K_(a_(2)) = 10^(-9) at 300K`. Which of the following statement is correct?A. `H_(2)SO_(3)` is less acidic than `H_(2)SO_(4)`.B. `HNO_(3)` is less acidic than `HNO_(2)`.C. `SO_(2)(g)` is reduced in the atmosphere during thunderstron.D. `CO_(2)` gas develop more acidity in rain water than `SO_(2)`.

Answer» Correct Answer - A


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