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JCECE Engineering JCECE Engineering Solved Paper-2014

  • question_answer
    For the reaction,\[Zn(s)+C{{u}^{2+}}(0.1M)\xrightarrow{{}}Z{{n}^{2+}}(1M)+Cu(s)t\]akmg place in a cell;\[E_{cell}^{\text{o}}\]is\[1.10\,\,V\].\[{{E}_{cell}}\] for the cell will be\[\left( 2.303\frac{RT}{F}=0.0591 \right)\]

    A) \[1.80\,\,V\]                      

    B)  \[1.07\,\,V\]

    C)  \[0.82\,\,V\]                     

    D)  \[2.14\,\,V\]

    Correct Answer: B

    Solution :

    \[{{E}_{cell}}=E_{cell}^{o}-\frac{0.0591}{n}\log \left( \frac{Z{{n}^{2+}}}{C{{u}^{2+}}} \right)\]\[=1.10-\frac{0.0591}{2}\log \frac{1}{0.1}=1.07\,\,V\]


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