• # question_answer 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) ${{P}_{{{H}_{2}}}}\,=\,\,2\,\,atm,\,[{{H}^{+}}]\,\,=\,\,0.1\,\,M$

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