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

Which one of the following pairs of solution is not an acidic buffer?
  1. HClO4 and NaClO4
  2. CH3COOH and CH3COONa
  3. H2CO3 and Na2CO3
  4. H3PO4 and Na3PO4

Solution

Strong acid with its salt cannot form buffer solution. HClO4 and NaClO4 cannot act as an acidic buffer.

Asked in: NEET 2015 (Phase 2)

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