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Question

Which one of the following pairs of solution is not an acidic buffer?

A
H2CO3 and Na2CO3
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B
H3PO4 and Na3PO4
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C
HClO4 and NaClO4
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D
CH3COOH and CH3COONa
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Solution

The correct option is C HClO4 and NaClO4
A buffer solution is one which resists changes in pH when small quantities of an acid or an alkali are added to it.
A solution of HClO4 and NaClO4 is not an acidic buffer because strong acid with its salt cannot form a buffer solution.

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