Which one of the following mixture cannot act like a buffer :

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0.1 M H2CO3 + 0.01 M NaHCO3

0.1 M KCN + 0.1 M HCN

0.1 M NaCl + 0.1 M HCl

0.2 M H2S + 0.4 M KHS

answer is C.

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Detailed Solution

A strong acid and its conjugate base cannot act like a buffer.

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