How many ions are produced in the solution of $[Pt(NH_3)_6]Cl_4$?

Which of the following is not an ambidentate ligand?

The given ligand 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 : $Co = 59, Cl = 35.5, Ag = 108$]

The following reaction is performed for detection of $NO_2^{-}$: $FeSO_4 + NO \rightarrow$ Product. Choose the correct statement.

$A$ monodentate ligand has