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The correct order of E(M^(2+)//M)^(@) Va...

The correct order of `E_(M^(2+)//M)^(@)` Values with negative sign for the four successive elements `Cr, Mn, Fe` and `Co` is:

A

`MngtCrgtFegtCo`

B

`CrgtFegtMngtCo`

C

`FegtMngtCrgtCo`

D

`CrgtMngtFegtCo`

Text Solution

Verified by Experts

The correct Answer is:
B
`E_(Mn^(2+),Mn)^(@)=-1.18V,E_(Cr^(2+),Cr)^(@)=-0.91V`
`E_(Fe^(2+),Fe)^(@)=-0.44V,E_(Co^(2+),Co)^(@)=-0.28V`
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