Question

`EAN` rule is followed by `K_(4)Fe(CN)_(6)` complex .
A. 36
B. 34
C. 38
D. 40

Answer 1

Correct Answer - 1
EAN( effective atomic number `) =` Atomic number of central metal atom- oxidation number of metal `+` number of electron gained from ligand.
ln `K_(4)[Fe(CN)_(6)], number of ligands `=6` and each ligand donates two electrons to `Fe EAN=26-2+2xx6=36`.