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Arrange the aqueous solution of the foll...

Arrange the aqueous solution of the following salts in the increasing order of pH
`underset(I)(CuSO_(4)) " " underset(II)(NaCN) " " underset(III)(KCl)`

A

`I lt II lt III`

B

`I lt III lt II`

C

`III lt II lt I`

D

`II lt III lt I`

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The correct Answer is:
B
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