Question

The oxidation number of Fe in $[Fe(CN{)}_6{]}^{3-}$ ion is

• A. +2
• B. + 3
• C. - 2
• D. - 3

Answer 1

Answer: (B)

Let O.N. of Fe in $[Fe(CN{)}_6{]}^{3-}$ is x
O.N. of C $(N^{-1}$ = -1)
= x + 6(-1) = -3
or x= +3