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When standard half-cell reduction potent...

When standard half-cell reduction potential of hydrogen would be negative ?

A

`p(H_(2))=2` atmosphere and `[H^(+)]=1.0M`

B

`p(H_(2))=2` atmosphere and `[H^(+)]=2.0M`

C

`p(H_(2))=1` atmosphere and `[H^(+)]=2.0M`

D

`p(H_(2))=1` atmosphere and `[H^(+)]=1.0M`

Text Solution

Verified by Experts

The correct Answer is:
A
`Pt|H_(2(g))|H_((aq))^(+)`
`H^(+)+e^(-) to (1)/(2)H_(2(g))("reduction")`
`E=E^(@)-(0.059)/(1)"log"([P_(H_(2))]^((1)/(2)))/([H^(+)])`
`E=E^(@)-(0.059)/(1)"log"((2)^((1)/(2)))/(1)=-ve`
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