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

  • question_answer
    Electrode potential of \[Z{{n}^{2+}}/Zn\] is \[-0.76\,V\] and that of \[C{{u}^{2+}}/Cu\] is \[+0.34V\]. The EMF of the cell constructed between these two electrodes is [EAMCET 1992; BHU 2001; CBSE PMT 2001; KCET 1990;  MHCET 1999, 2003; Pb. CET 2002; AFMC 2001;  Pb. PMT 2004]

    A)                 1.10 V   

    B)                 0.42 V

    C)                 ? 1.1V  

    D)                 ? 0.42 V

    Correct Answer: A

    Solution :

                    \[E_{\text{cell}}^{o}=E_{\text{cathode}}^{o}-E_{\text{anode}}^{o}\]\[=0.34-(-\,0.76)\]\[=1.10\,\,V\].


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