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

  • question_answer
    For the redox reaction \[Zn(s)+C{{u}^{2+}}(0.1M)\to Z{{n}^{2+}}(1M)+Cu(s)\] taking place in a cell, \[E_{cell}^{o}\] is 1.10 volt. \[{{E}_{cell}}\] for the cell will be \[\left( 2.303\frac{RT}{F}=0.0591 \right)\]                                       [AIEEE 2003]

    A)                 2.14 volt              

    B)                 1.80 volt

    C)                 1.07 volt              

    D)                 0.82 volt

    Correct Answer: C

    Solution :

               \[E={{E}^{o}}-\frac{0.059}{n}\log \frac{[Z{{n}^{++}}]}{[C{{u}^{++}}]}\]\[=1.10-\frac{0.059}{2}\log \frac{1}{0.1}\]                                 \[=1.10-0.0295\,\log \,10=1.07\,volt\].


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