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Which one of the following pairs of solutions is not an acidic buffer ?
A. `H_(2)CO_(3)+Na_(2)CO_(3)`
B. `H_(3)PO_(4)+Na_(3)PO_(4)`
C. `HClO_(4)+NaClO_(4)`
D. `CH_(3)CO OH + CH_(3) CO ON a`

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Correct Answer - C
`HClO_(4)` is a strong acid. Hence, it cannot be used to make an acidific buffer.

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