The reduction potential of hydrogen half-cell will be negative if:

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PH2=1atm and H+=2.0M

PH2=1 atm and H+=1.0M

PH2=2atm and H+=1.0M

PH2=2atm and H+=2.0M

answer is C.

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Detailed Solution

2H(4) )++2e−⟶H2(3)ERP=ERP+−0.0591nlog⁡PH2H+2=0−0.05912log⁡2(1)2

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