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For successive members of the first seri...

For successive members of the first series of the transition metals are listed below. For which one of the them the standard potential `(E_(M^(2+)|M)^(@))` value has a positive sign -

A

`Ni(Z=28)`

B

`Cu(Z=29)`

C

`Fe(Z=26)`

D

`Co(Z=27)`

Text Solution

Verified by Experts

The correct Answer is:
B
Among the given elements, only `Cu` stands below hydrogen in the electrochemical series. Hence only `Cu` possess a positive standard electrode potential.
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