VMMC VMMC Medical Solved Paper-2004

  • question_answer
    The e. m. f. of a galvanic cell with electrode potentials of \[Z{{n}^{2+}}/Zn=-0.76\,V.\]and that of \[C{{u}^{2+}}/Cu=+\,0.34V,\]is

    A)  + 0.34V               

    B)         + 0.76V               

    C)         -1.1 V                  

    D)         +1.1 V

    Correct Answer: D

    Solution :

    As the \[{{\text{E}}^{\text{o}}}\text{re}{{\text{d}}^{\text{0}}}\text{.}\]is lesser for Zn, hence it will act as anode and Cu as cathode in the galvanic cell. Hence, \[\text{E}_{cell}^{o}=E_{cathode}^{o}-E_{anode}^{o}\] = (0.34) - (- 0.76) =1.1V


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