1.

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

Answer»

`P_((H_(2)))=1atm" "and [H^(+)]=2.0M`
`P_((H_(2)))=1atm and [H^(+)]=1.0M`
`P_((H_(2)))=2atm and [H^(+)]=1.0M`
`P_((H_(2)))=2atm and [H^+]=2.0M`

Solution :`2_((aq))^(+)+2e^(-)toH_(2(g))`
`E_(red)=E_(red)^(@)-(0.0591)/(N)log((P_((H_(2))))/((H^(+))^(2))`
`E_(red)=0-(0.0591)/(2)log((2)/((1)^(2))`
`E_(red)=(0.0591)/(2)log2`
`thereforeE_(red)` is found to be negative for (c) option.


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