Coordination number of Fe in the complexes $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-},\left(\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$ and $\left[\mathrm{FeCl}_4\right]^{-}$would be respectively

• A

  $2, 3, 3$
• Correct answer
  B

  $6,6,4$
• C

  $6,3,3$
• D

  $6,4,6$

Solution

Coordination number of Fe Coordination number is the number of atoms, molecules or ions bonded to it.

Hence, the correct answer is option: 'B'.