MHTCET 22 Apr 2025 Shift 2 Paper

Concept:Ligands are classified by the charge they carry when bonded to a metal centre in a coordination complex.Explanation:A neutral ligand carries zero charge.Carbonyl is $\mathrm{CO}$; it is a neutral ligand because carbon monoxide has no charge.Sulphato is $\mathrm{SO}_4^{2-}$; it is an anionic ligand with a charge of $-2$.Oxalato is $\mathrm{C}_2\mathrm{O}_4^{2-}$; it is an anionic ligand with a charge of $-2$.Bromo is $\mathrm{Br}^-$; it is an anionic ligand with a charge of $-1$.Thus, among the four options, only carbonyl is neutral.Answer:Option A - Carbonyl $(\mathrm{CO})$