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CET Karnataka Engineering CET - Karnataka Engineering Solved Paper-2010

  • question_answer
    The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the reaction of the cell is

    A)   \[{{10}^{25}}\]                                  

    B)   \[{{10}^{20}}\]

    C)   \[{{10}^{15}}\]                                  

    D)   \[{{10}^{30}}\]

    Correct Answer: D

    Solution :

      \[E_{cell}^{o}=\frac{0.0591}{n}\log \,\,{{K}_{c}}\]                 \[0.59=\frac{0.0591}{3}\log \,\,{{K}_{c}}\]           \[\frac{0.059\times 3}{0.059}=\log \,\,{{K}_{c}}\] \[\therefore \]  \[\log \,{{K}_{c}}=30\]                 \[{{K}_{c}}=\] antilog 30                 \[={{10}^{30}}\]


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