Q. Ethylene diamine is an example of a ligand:

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Solution:

Ligands are the neutral molecules, anions or cations which are directly linked to the central metal atom or ion in a complex ion.
Monodentate ligand: They have one donor atom i.e., they donate only one electron pair to the central atom or ion. Examples are
Bidentate ligand: The ligands which have two donor atoms i.e., they donate two electron pairs.
Ethylene diamine has the formula: , and it contains two donor atoms. So, it is a bidentate ligand.