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

Options

A. `p(H_(2))=1atm,[H^(+)]=1M`
B. `p(H_(2))=1atm,[H^(+)]=2M`
C. `p(H_(2))=2atm,[H^(+)]^(-)=2M`
D. `p(H_(2))=2.5atm,[H^(+)]=1.5M`

Answer

B

Explanation

`E_(H^(+)//H_(2),Pt)=(-0.059)/(n)log.((PH_(2))^(1//2))/([H^(+)])`