Published by:
CGP EDU Academic Team
Published on: August 13, 2026
The correct order of 
values with negative sign for the four successive elements Cr, Mn, Fe and Co is
Text Solution
Verified by ExpertsThe correct answer is:
A
Generally across the first transition series, the negative values for standard electrode potential decrease (exception Mn- due to stable d5 configuration)
Standard electrode potential –
Mn Cr Fe Co
M2+/M –1.18 –0.90
0.44 –0.28 eV
So, correct order is Mn > Cr > Fe > Co.
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