Chemistry - Carbonyl compounds Question with Solution | TestHub

${\text{K}}_3\left[\text{F}\text{e}{\left(\text{C}\text{N}\right)}_6\right]\Rightarrow {\left[\text{F}\text{e}{\left(\text{C}\text{N}\right)}_6\right]}^{3-}$

$\text{x}+6\left(-1\right)=-3$

$\therefore \text{x}=+3$

Coordination number of Fe is 6 as 6$\text{C}{\text{N}}^{-}$are attached.