E0M2+(aq)/M(s)has a positive value for which of the following elements of 3d transition series?
A
Cu
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B
Zn
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C
Cr
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D
Co
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Solution
The correct option is A Cu According to the electrochemical series, elements present above H have postive E0value.
Usually across the first transition series, the negative values for standard electrode potential decrease except for Mn and Zn due to stable d5 and d10-configuration.
For M2+(aq)/M(s),outofthegivenoption,Cu2+(aq)/Cu(s)willbetheanswer