1.

Which one is buffer solution

Answer»

`[PO_(4)^(-)] [HPO_(4)^(-)]`
`[PO_(3)^(3-)] [[H_(2)PO_(4)^(-)]`
`[HPO_(4)^(-)] [H_(2)PO_(4)^(-)]`
All of these

SOLUTION :[Normal SALT + acidic salt] is a buffer solution.


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