NEET Sample Paper NEET Sample Test Paper-51

  • question_answer 66) The reduction potential of hydrogen half cell will be most negative if:

    A) \[{{P}_{{{H}_{2}}}}\,=\,\,1\,\,atm,\,[{{H}^{+}}]\,\,=\,\,1\,\,M\]

    B) \[{{P}_{{{H}_{2}}}}\,=\,\,1\,\,atm,\,[{{H}^{+}}]\,\,=\,\,2\,\,M\]

    C) \[{{P}_{{{H}_{2}}}}\,=\,\,2\,\,atm,\,[{{H}^{+}}]\,\,=\,\,1\,\,M\]

    D) \[{{P}_{{{H}_{2}}}}\,=\,\,2\,\,atm,\,[{{H}^{+}}]\,\,=\,\,0.1\,\,M\]

    Correct Answer: D

    Solution :

    \[2{{H}^{+}}+\underset{(g)}{\mathop{2{{e}^{-}}}}\,\to {{H}_{2}}\] \[{{E}_{red}}\,=\,{{E}^{{}^\circ }}_{\operatorname{Re}d}-\frac{0.059}{2}\,\,\log \,\frac{{{P}_{{{H}_{2}}}}}{{{\left[ {{H}^{+}} \right]}^{2}}}\]

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