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

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    If the \[\Delta G\] of a cell reaction \[AgCl+{{e}^{-}}\to Ag+C{{l}^{-}}\] is \[-21.20\ KJ\]; the standard e.m.f., of cell is                    [MP PMT 2004]

    A)                 0.229 V

    B)                 0.220 V

    C)                 ? 0.220 V             

    D)                 ? 0.110 V

    Correct Answer: B

    Solution :

               Given: \[\Delta G=-21.20\ kJ\ =21200J\]                    \[\because \ \ \Delta G=-nFE\]                                 \[E=\frac{21200}{1\times 96500}=0.2196\ V=0.22\ V.\]


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