1.

Arrange the acids (i) H_(2)SO_(3) (ii) H_(3)PO_(3) and (iii) HClO_(3) in the decreasing order of acidity.

Answer»

`(i) gt (iii) gt (II)`
`(i) gt (ii) gt (iii)`
`(ii) gt (iii) gt (i)`
`(iii) gt (i) gt (ii)`

Solution :Acidity is directly proportional to oxidation NUMBER. As the oxidation number of S, P and Cl in `H_(2)SO_(3), H_(3)PO_(3) and HClO_(3)` is `+4,+3,+5` RESPECTIVELY. So decreasing order of acidity will be `(iii) gt (i) gt (ii)`


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