Q.

The set which does not have ambidentate ligand(s) is                    [2023]

1 EDTA4-,NCS-,C2O42-  
2 NO2-,C2O42-,EDTA4-  
3 C2O42-,ethylene diammine,H2O  
4 C2O42-,NO2-,NCS-  

Ans.

(3)

NCS-,NO2- are ambidentate ligands.