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

  • question_answer
    The cell reaction of a cell is                 \[M{{g}_{(s)}}+C{{u}^{2+}}(aq)\to C{{u}_{(s)}}+M{{g}^{2+}}(aq)\] If the standard reduction potentials of \[Mg\] and \[Cu\] are \[-\,2.37\] and \[+\,0.34\,V\] respectively. The emf of the cell is [EAMCET 1995; JIPMER (Med.) 2001; AFMC 2002; CBSE PMT 2002]

    A)                 2.03 V   

    B)                 ? 2.03 V

    C)                 + 2.71 V               

    D)                 ? 2.71 V

    Correct Answer: C

    Solution :

               \[E_{cell}^{o}=E_{cathode}^{o}-E_{anode}^{o}\]                                 \[=0.34-(-\,2.37)=+\,2.71\,\,V\].


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