BCECE Medical BCECE Medical Solved Papers-2006

  • question_answer
    The metal that does not displace hydrogen from an acid is :

    A)  Ca             

    B)  Al

    C)  Zn            

    D)  Hg

    Correct Answer: D

    Solution :

    Mercury cannot displace hydrogen from acid. The reason can be explained on the basis of electrochemical series. The metal, which is placed above hydrogen in this series, can displace hydrogen from an acid. Mercury is placed below hydrogen in ECS, hence, it cannot displace hydrogen from an acid.


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