Q.

Homoleptic complex from the following complexes is              [2023]

1 pentaamminecarbonatocobalt(III) chloride  
2 triamminetriaquachromium(III) chloride  
3 potassium trioxalatoaluminate(III)  
4 diamminechloridonitrito-N-platinum(II)  

Ans.

(3)

Complexes in which a metal is bounded to only one kind of ligand are known as homoleptic complexes. Potassium trioxalatoaluminate(III), K3[Al(C2O4)3] is an example of homoleptic complex.