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

  • question_answer
    \[{{E}^{o}}\] for the cell \[Zn|Z{{n}^{2+}}(aq)||C{{u}^{2+}}(aq)|Cu\] is \[1.10\,V\] at \[{{25}^{o}}C\], the equilibrium constant for the reaction \[Zn+C{{u}^{2+}}(aq)\]⇌\[Cu+Z{{n}^{2+}}(aq)\] is of the order of [CBSE PMT 1997]

    A)                 \[{{10}^{-28}}\]                

    B)                 \[{{10}^{-37}}\]

    C)                 \[{{10}^{+18}}\]               

    D)                 \[{{10}^{+17}}\]

    Correct Answer: B

    Solution :

               \[E_{cell}^{o}=\frac{0.059}{n}\log \,\,K\]                                 \[\log \,\,K=\frac{1.10\times 2}{0.059}=37.2881\] or \[K={{10}^{-37}}\].


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