In the compound lithium tetrahydroaluminate,the ligand is

Define the following terms: Homoleptic and heteroleptic complexes.

In $K_4[Fe(CN)_6]$,the primary valency of iron is .........

In the complex $[E(en)_2(C_2O_4)]NO_2$,the oxidation state and coordination number of the element $'E'$ are respectively (where $(en)$ is ethylenediamine):

The coordination numbers of $Fe$ in the complexes $[Fe(CN)_6]^{4-}$,$[Fe(CN)_6]^{3-}$,and $[FeCl_4]^{-}$ are respectively:

Explain the bonding in coordination compounds in terms of Werner's postulates.