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

Options

A. `P_(H_(2))=1 ` atm and `[H^(+)]=1.0M`
B. `P_(H_(2))=2` atm and `[H^(+)]=2.0M`
C. `P_(H_(2))=2` atm and `[H^(+)]=1.0M`
D. `P_(H_(2))=1` atm and `[H^(+)]=2.0M`

Answer

3

Explanation

`2H^(+)+2e^(-)rarrH_(2)" ":." "RP=0.0-(0.059)/(2)log.(P_(H_(2)))/([H^(+)]^(2))`