1.

Arrange the acids (i) H_2SO_3 (ii) H_3PO_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 pf S,P and CL in `H_2SO_3,H_3PO_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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