Question

The oxidation state of iron in $K_4\left[Fe{\left(CN\right)}_6\right]$ is:

• A. $1$
• B. $4$
• C. $3$
• D. $2$

Answer 1

The correct option is D $2$

Let the oxidation state of Fe is $x$ in $K_4\left[Fe\right(CN{)}_6]$.

To find it :

$4\times 1+x+(-1)\times 6=0$

$x=+2$

Hence, option $D$ is correct.