In the complex ions \([Fe(C_2O_4)_3]^{3-}\). The coordination number of Fe is:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 6
The coordination number is the number of ligand donor atoms bonded to the metal, not the number of ligands. The oxalate ion \( \ce{C2O4^2-} \) is a didentate ligand: it binds through two oxygen atoms.
Coordination number = 3 oxalate ions × 2 donor atoms = 6
NCERT (2026-27 edition):
Coordination Number
