Which of the following compounds contains complex anions?

The ligand present in lithium tetrahydroaluminate is........

What fraction of chlorine will be precipitated as $AgCl$ by using $AgNO_3$ from $[CrCl(NH_3)_5]Cl_2$?

In the brown ring complex $[Fe(H_2O)_5(NO)]SO_4$,nitric oxide behaves as:

The number of chloride ions produced in an aqueous solution of tetraamminedichloroplatinum $(IV)$ chloride is ...........

$2.33 \ g$ of compound $X$ (empirical formula $= CoH_{12}N_{4}Cl_{3}$) upon treatment with excess $AgNO_{3}$ solution produces $1.435 \ g$ of a white precipitate. The primary and secondary valences of cobalt in compound $X$,respectively are.
[Given,atomic mass : $Co = 59, Cl = 35.5, Ag = 108$]