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The standard oxidation potentials of the...

The standard oxidation potentials of the electrodes `Ag|Ag^+,Sn|Sn^(2+),Ca|Ca^(2+),Pb|Pb^(2+)` are `-0.8,0.136,2.866 `and` 0.126V` respectively. The most powerful oxidising agent among these metal ions is :

A

`Pb^(2+)`

B

`Ca^(2+)`

C

`Sn^(2+)`

D

`Ag^+`

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The correct Answer is:
D
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