MHTCET 10 May 2024 Shift 1 Paper

Concept:A heteroleptic complex contains two or more different types of ligands attached to the central metal ion.Explanation:In a homoleptic complex, only one type of ligand is present.Check each option:Option A: $\mathrm{Na}_{3}\left[\mathrm{Co}\left(\mathrm{NO}_{2}\right)_{6}\right]$ has only $\mathrm{NO}_2$ ligands, so it is homoleptic.Option B: $\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}(\mathrm{NSC})\right]^{2+}$ has both $\mathrm{H}_2\mathrm{O}$ and $\mathrm{NSC}$ ligands, so it is heteroleptic.Option C: $\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right]^{2+}$ has only $\mathrm{NH}_3$ ligands, so it is homoleptic.Option D: $\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}$ has only $\mathrm{C}_2\mathrm{O}_4$ ligands, so it is homoleptic.Hence, the complex with two different ligands is option B.Answer:$\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5}(\mathrm{NSC})\right]^{2+}$