AIIMS AIIMS Solved Paper-2010

  • question_answer
    The potential of hydrogen electrode having a solution of \[pH=4\] at \[{{25}^{o}}C\] is

    A) \[-0.177V~\]      

    B)        \[-0.236V\]        

    C) \[+\text{ }0.177V\]         

    D)        \[+\text{ }0.236V\]

    Correct Answer: B

    Solution :

    \[E={{E}^{o}}-\frac{0.059}{n}\log \frac{1}{[{{M}^{n+}}]}\] \[=0-\frac{0.059}{1}\log \frac{[1]}{[{{10}^{-4}}]}\] \[=-0.236V\]


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