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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.

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The E°M3+/M2+ values for Cr, Mn, Fe and Co are -0.41,+ 1.57, +0.77 and +1.97 V. respectively. For which one of these metalsthe change in oxidation state from + 2 to + 3 is easiest? 

(a) Cr 

(b) Mn 

(c) Fe 

(d) Co

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1 Answer

+1 vote
by (74.4k points)
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Best answer

Correct option (a) Cr 

Explanation:

Better reducing agent has more negative value of E° red. 

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