BHU PMT BHU PMT (Mains) Solved Paper-2008

  • question_answer
    The standard emf of a cell, involving one electron change is found to be 0.591 V at\[\,25{}^\circ C\]. The equilibrium constant of the reaction is (\[F=96500\text{ }C\text{ }mo{{l}^{-1}}\])

    A) \[1.0\times {{10}^{1}}\]                

    B) \[1.0\times {{10}^{5}}\]

    C)  \[1.0\times g{{10}^{10}}\]          

    D) \[1.0\times {{10}^{30}}\]

    Correct Answer: C

    Solution :

                     \[E_{cell}^{o}=\frac{0.0591}{n}\log K\] Given,                   \[n=1\] \[E_{cell}^{o}=0.591V\] \[0.591=\frac{0.0591}{1}\log K\] \[\log K=10\] \[K=1\times {{10}^{10}}\]


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