How many ions will be obtained by ionization of ferric hexacyanoferrate$(III)$ complex compound?

The complex of $Ni^{2+}$ ion and dimethylglyoxime contains $..........$ number of Hydrogen $(H)$ atoms.

The ligand $N(CH_2-CH_2-NH_2)_3$ is : $-$

An excess of $AgNO_3$ is added to $100 \ mL$ of a $0.05 \ M$ solution of tetraaquadichloridochromium$(III)$ chloride. The number of moles of $AgCl$ precipitated will be . . . . . . $\times 10^{-3}$. (Nearest integer)

In dichlorodioxalatochromium$(III)$,the primary and secondary valencies are respectively ......

Primary and Secondary valency of $Co$ in the complex compound $[Co(en)_3]Cl_3$ is respectively . . . . . . .