Which one of the following pairs of solutions is not an acidic buffer? [2015]

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Solution

Q.
Which one of the following pairs of solutions is not an acidic buffer [2015]

1 ${CH}_{3} COOH$ and ${CH}_{3} COONa$

2 $H_{2} {CO}_{3}$ and ${Na}_{2} {CO}_{3}$

3 $H_{3} {PO}_{4}$ and ${Na}_{3} {PO}_{4}$

4 ${HClO}_{4}$ and ${NaClO}_{4}$

Ans.
(4)

Acidic buffer is a mixture of a weak acid and its salt with a strong base. ${HClO}_{4}$ is a strong acid.

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