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.



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