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JEE Main & Advanced Chemistry Electrochemistry / विद्युत् रसायन Question Bank Electrode potential Ecell Nernst equation and ECS

  • question_answer
    Which one of the following metals cannot evolve \[{{H}_{2}}\]from acids or \[{{H}_{2}}O\] or from its compounds [MP PET/PMT 1988; CPMT 1996;  AFMC 1998, 99; Pb. PET 1999; BVP 2003]

    A)                 \[Hg\]  

    B)                 \[Al\]

    C)                 \[Pb\]  

    D)                 \[Fe\]

    Correct Answer: A

    Solution :

                    \[Hg\] has greater reduction potential than that of \[{{H}^{+}}\]and hence cannot displace hydrogen from acid.


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