Question

The $EAN$ of iron in ${\left[Fe{\left(CN\right)}_6\right]}^{3-}$ is:

• A. $34$
• B. $36$
• C. $37$
• D. $35$

Answer 1

The correct option is D $35$

EAN = electron on metal ion + electron donateted by ligands
Here, electrons in $F{e}^{+3}=23$ and $C{N}^{-}=6\times 2=12$
so, EAN = 35.