Which of the following is an example of a homoleptic complex?

Define the following terms: Homoleptic and heteroleptic complexes.

What is the total number of ions released in the aqueous solution of ferric hexacyanoferrate $(II)$?

Ammonia acts as a ligand but ammonium ion does not form complexes because

Assertion : $A$ chelating ligand must possess two or more lone pairs at such a distance that it may form suitable strain-free rings at the metal ion.
Reason : $H_2N-NH_2$ is a chelating ligand.

The number of coordinate bonds in $[Co(NH_3)_6]Cl_3$ is ...... .