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The oxidation ptentials of Zn, Cu, Ag, H...

The oxidation ptentials of `Zn, Cu, Ag, H_2` and Ni are `0.76, - 34, - 0.80 . 0. 00, 0. 25` volt, respectively. Which of the following reactions will provide maximum voltage ?

A

`Zn +Cu^(2+) rarr Cu +Zn^(2+)`

B

`Zn +2Ag^(+) rarr 2Ag +Zn^(2+)`

C

`H_(2) +Cu^(2+) rarr 2H^(+) +Cu`

D

`H_(2) +Ni^(2+) rarr 2H^(+) +Ni`

Text Solution

Verified by Experts

The correct Answer is:
B
`E_("cell")^(@)=E_(c )^(@)-E_(p)^(@)` check for each reaction.
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