The total number of ions present in $K_4[Fe(CN)_6]$ is .....

The oxidation state and covalency of $Al$ in $[AlCl(H_2O)_5]^{2+}$ respectively are

Which complexes have zero oxidation state?

What is the number of donor atoms in dimethylglyoximato ligand?

Define the following terms:
$1$. Coordination entity
$2$. Central metal ion

Select the correct statements about the $PtCl_4 \cdot 4NH_3$ complex salt:
$I.$ All the chlorides are bonded by primary valency.
$II.$ All the chlorides are bonded by secondary valency.
$III.$ All the $NH_3$ are bonded by secondary valency.
$IV.$ Half of the chlorides are bonded with secondary valency.