(B) The given complex is ${K_3}[Fe(CN)_6]$.Let the oxidation state of $Fe$ be $x$.The oxidation state of $K$ is $+1$ and the oxidation state of $CN^-$

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

(B) The given complex is ${K_3}[Fe(CN)_6]$.Let the oxidation state of $Fe$ be $x$.The oxidation state of $K$ is $+1$ and the oxidation state of $CN^-$ is $-1$.Sum of oxidation states in a neutral complex is $0$.$3(+1) + x + 6(-1) = 0$$3 + x - 6 = 0$$x - 3 = 0$$x = +3$Therefore,the oxidation state of $Fe$ is $+3$.