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NEET Sample Paper NEET Sample Test Paper-74

  • question_answer
    The solution which maintains its pH constant even upon addition of small amounts of acid or base, is called buffer solution. Which can act as a buffer?

    A)  \[\operatorname{N}{{H}_{4}}Cl\,\,+\,\,N{{H}_{4}}OH\]

    B)  \[{{\operatorname{CH}}_{3}}COOH\,\,+\,\,C{{H}_{3}}COONa\]

    C)  40 ml of 0.1 M NaCN + 20 mL of 0.1 M HCN      

    D)  All of the above

    Correct Answer: D

    Solution :

    Buffer is a solution of weak acid and a conjugate of weak acid or a weak base and a conjugate of weak base       \[N{{H}_{4}}Cl+N{{H}_{4}}OH\] \[C{{H}_{3}}COOH+ C{{H}_{3}}COONa, \,NaCN+HCN\] +2+ 4-2      + 2-2 . +4


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