Redox Reactions And Electrochemistry Ques 459

Question: Oxidation state of $ Fe $ in $ Fe_3O_4 $ is [CBSE PMT 1999; AIIMS 2002]

Options:

A) $ \frac{3}{2} $

B) $ \frac{4}{5} $

C) $ \frac{5}{4} $

D) $ \frac{8}{3} $

Show Answer

Answer:

Correct Answer: D

Solution:

$ \overset{*}{\mathop{F}},e_3O_4 $ $ 3x+(-8)=0 $ ; $ 3x-8=0 $ $ 3x=8 $ ; $ x=\frac{8}{3} $ .



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