When a di- or polydentate ligand uses its two or more donor atoms to bind a single metal ion, it is said to be a _________ligand.

________ is equal to the co-ordination number and is fixed for a metal.

A ligand that has a single donor atom can form only one dative bond with the central atom or ion, such ligands are called

Complexes in which a metal is bound to more than one kind of donor groups are known as _________complexes.

Hardness of water is estimated by simple titration with

When a ligand bound to a metal ion through a single donar atom, then the ligand is known as ______ligand.

When several donar atoms are present in a single ligand then the ligand is said to be _______ ligand.

In a square planar complex of formula [Mx₂L₂] the two ligands x may be arranged adjacent to each other, then the isomer is known as ________ isomer.

When a di- or polydentate ligand uses its two or more donor atoms to bind a single metal ion, it is said to be a _________ligand.

______________ of the central atom in a complex is defined as the charge it would carry if all the ligands are removed along with electron pair that are shared with the central atom.