Question

Both potassium ferrocyanide & potassium ferricyanide are diamagnetic.

• A. True
• B. False

Answer 1

The correct option is B False

$K_3\left[Fe{\left(CN\right)}_6\right]\to d^5$ (unpaired $e^{-}=1$)

$F{e}^{3+}$ is ferri and $F{e}^{2+}$ is ferro

Thus potassium ferricyanide is Paramgnetic.

$K_4\left[Fe{\left(CN\right)}_6\right]\to d^6$ (unpaired $e^{-}=0$)

Thus potassium ferrocyanide is dimagnetic.