Which from the following coordinate complexes contains anionic and neutral ligands in it?

Which from the following coordinate complexes contains anionic and neutral ligands in it?
  1. Potassium trioxalatoaluminate(III)
  2. Hexacyanoferrate (II)
  3. Pentaamminecarbonatocobalt (III) chloride
  4. Tetraamminecopper(II) ion

Solution

Pentaamminecarbonatocobalt(III) chloride: $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5\left(\mathrm{CO}_3\right)\right] \mathrm{Cl}$ It contains anionic ligand $\left(\mathrm{CO}_3^{2-}\right)$ and neutral ligand $\left(\mathrm{NH}_3\right)$.

Asked in: MHT CET 2023 (09 May Shift 2)

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