A) \[0.8\,M\,{{H}_{2}}S+0.8\,M\,KHS\]
B) \[2\,M\,{{C}_{6}}{{H}_{5}}N{{H}_{2}}+2M\,{{C}_{6}}{{H}_{5}}\overset{+}{\mathop{N}}\,{{H}_{3}}\,Br\]
C) \[3\,M\,{{H}_{2}}C{{O}_{3}}+3\,M\,KHC{{O}_{3}}\]
D) \[0.05\,M\,KCl{{O}_{4}}+0.05\,M\,HCl{{O}_{4}}\]
Correct Answer: D
Solution :
Because \[HCl{{O}_{4}}\]is a strong acid. While buffer is a mixture of weak acid and their salt.
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