The oxidation potential of hydrogen half-cell will be negative if

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pH2=1atm and H+=1M

pH2=1atm and H+=2M

pH2=0.2atm and H+=1M

pH2=0.2atm and H+=0.2M

answer is B.

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Detailed Solution

H2 →2 H+ + 2 e Eoxd=Eox0-0.0529nlog[H+]2PH2

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