JEE Main & Advanced Sample Paper JEE Main Sample Paper-26

  • question_answer
    A hydrogen gas electrode is made by dipping platinum wire in a solution of \[HC\,l\] of \[pH=10\] and by passing hydrogen gas around the platinum wire at one atm pressure The oxidation potential of electrode would be? \[(T=298\,K)\]

    A)  \[0.59\] V                                 

    B)  \[0.118\] V

    C)  \[1.18\] V                                 

    D)  \[0.059\] V

    Correct Answer: A

    Solution :

    \[\underset{1\,atm}{\mathop{{{H}_{2}}}}\,\,\xrightarrow{\,}\,\underset{{{10}^{-10}}}{\mathop{2{{H}^{+}}}}\,+2{{e}^{-}}\] \[{{E}_{{{H}_{2}}/{{H}^{+}}}}\,=0-\frac{0.059}{2}\,\log \,\frac{{{({{10}^{-10}})}^{2}}}{1}\] \[{{E}_{{{H}_{2}}/{{H}^{+}}}}\,=+0.59\,V\]

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