(a) Define ligand.
(b) Give two examples for monodentate and bidentate ligands.

Explanation

Ligand. It is an atom or ion or molecule which can donate at least one lone pair of electron to a metal atom/ion forming coordinate bond.
Monodentate ligands : `F^(-),H_(2)O`
Bidenate ligands :
Ethylene diamine `" "` Oxalate
`underset(CH_(2)-NH_(2)) underset(|)(CH_(2)-NH_(2)) underset(O= C-O^(Ɵ)) underset(|)(O=C-O^(Ɵ))`