Identify the correct statements from the following A. [Fe(C₂O₄)₃]³⁻ is the most stable complex among [Fe(OH)₆]³⁻ , [Fe(C₂O₄)₃]³⁻ and [Fe(SCN)₆]³⁻ B. The stability of [Cu(NH₃)₄]²⁺ is greater than that of [Cu(en)₂]²⁺ C. The hybridization of Fe in K₄[Fe(CN)₆] is d^2sp^3 D. [Fe(NO₂)₃Cl₃]³⁻ exhibits linkage isomerism E. NO₂^- and SCN^- ligands are NOT ambidentate ligands Choose the correct answer from the options given be

Step-by-step solution

Statement A is correct. The oxalate ion ( C₂O₄²⁻ ) is a bidentate ligand and forms chelate rings with the central metal ion. Due to the chelate effect, [Fe(C₂O₄)₃]³⁻ is more stable than complexes formed by monodentate ligands like [Fe(OH)₆]³⁻ and [Fe(SCN)₆]³⁻ . Statement B is incorrect. Ethylenediamine (en) is a bidentate ligand and forms chelate rings, whereas NH₃ is a monodentate ligand. Therefore, [Cu(en)₂]²⁺ is more stable than [Cu(NH₃)₄]²⁺ due to the chelate effect. Statement C is correct. In K₄[Fe(CN)₆] , the