Redox Reactions And Electrochemistry Ques 645
Question: The $ E{{{}^\circ }_{{M^{3+}}/{M^{2+}}}} $ values for $ Cr,Mn,Fe $ and Co are $ -0.41,+1.57,+0.77 $ and + 1.97V respectively For which one of these metals the change in oxidation state from +2 to +3 is easiest-
Options:
A) Fe
B) Mn
C) Cr
D) Co
Show Answer
Answer:
Correct Answer: C
Solution:
[c] The given values show that Cr has highest negative value of $ E_{{M^{3+}}/{M^{2+}}}^{\circ } $ i.e., Cr is the strongest reducing agent among given metals therefore its oxidation will be easiest.
