Which one of the following is not a buffer so | vedclass

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(D) buffer solution is typically composed of a weak acid and its conjugate base (salt) or a weak base and its conjugate acid (salt).$A$. $H_2S$ is a w

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$0.05 \ M \ KClO_4 + 0.05 \ M \ HClO_4$

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(D) buffer solution is typically composed of a weak acid and its conjugate base (salt) or a weak base and its conjugate acid (salt).$A$. $H_2S$ is a weak acid and $KHS$ is its salt,so it forms a buffer.$B$. $C_6H_5NH_2$ (aniline) is a weak base and $C_6H_5NH_3Br$ is its salt,so it forms a buffer.$C$. $H_2CO_3$ is a weak acid and $KHCO_3$ is its salt,so it forms a buffer.$D$. $HClO_4$ (perchloric acid) is a strong acid. $A$ mixture of a strong acid and its salt does not act as a buffer solution.Therefore,the correct option is $D$.

Which one of the following is not a buffer solution?

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