1.

Arrange the acids (I) H_(2)SO_(3) (II) H_(3)PO_(3) (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 O. No. of S, P and CL in `H_(2)SO_(3), H_(3)PO_(4)` & `HClO_(3)` is +4, +3 & +5 repsectively so decreasing order of acidity will be `III gt I gt II`.


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