Q. The $E{^\circ}_{M^{3 +}/M^{2 +}}$ 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?

A) Fe
B) Mn
C) Co
D) Cr
Explanation

(d)
As Cr has maximum oxidation potential value, therefore its oxidation should be easiest

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.