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

Options

(a) CH₃COOH and CH₃COONa
(b) H₂CO₃ and Na₂CO₃
(c) H₃PO₄ and Na₃PO₄
(d) HClO₄ and NaClO₄

Correct Answer:

HClO₄ and NaClO₄

Explanation:

Acidic buffer is a mixture of a weak acid and its salt with a strong base.
HClO₄ is a strong acid.