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The E(M^(3+)//M^(2+))^(@) values for Cr,...

The `E_(M^(3+)//M^(2+))^(@)` values for Cr, Mn Fe and Co are -0.41, + 1.57, + 0.77 and +1.97V respectively. For which one of these metals the change in oxidation state form +2 to +3 is easiest ?

A

Cr

B

Co

C

Fe

D

Mn.

Text Solution

Verified by Experts

The correct Answer is:
A
Change in O.S. from +2 to +3i.e. Oxidation will be easy for `M^(2+)` with highest O.P. or lowest R.P. Thus change in oxidation state of `Cr^(2+)` to `Cr^(3+)` is easiest out of the given four metal ions.
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