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

The `E_(M ^(3+//M^(2+)))^(@)` values for Cr, Mn, Fe and Co are -0.41,+1.57,+0.7and +1.97V respectively. For which one of these metals the change in oxidation state from +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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The E_(M^(3+)//M^(2+)^@ values for Cr , Mn, Fe and Co are 0.41, + 1.57 , + 0.77 and +1, 97 V respectively. For which one of these metals the change in oxidation state from =2 to 3 is easiest :

The E_(M^(3+)//M^(2+))^(@) values for Cr,Mn,Fe andCo are 0.41,+1.57,+0.77 and +1.97 V respectively .For which one of these metal the change in oxidation state from +2 to +3 is easiest:

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E^(Theta) value for the couple Cr^(3+)//Cr^(2+) and Mn^(3+)//Mn^(2+) are -0.41 and +1.51 volts respectively. Considering these value select the correct option from the following statements.

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