Redox Reactions And Electrochemistry Ques 692
Question: Which of the following involves transfer of five electrons-
Options:
A) $ MnO_4^{-}\to M{{n}^{2+}} $
B) $ CrO_4^{2-}\to C{{r}^{3+}} $
C) $ MnO_4^{2-}\to MnO_2 $
D) $ Cr_2O_7^{2-}\to 2C{{r}^{3+}} $
Show Answer
Answer:
Correct Answer: A
Solution:
[a] O.N. of Mn in $ MnO_4^{-} $ is +7 and in $ M{{n}^{2+}} $ it is +2. The difference is of 5 electrons.
