The number of coordinate bonds in $[Co(NH_3)_6]Cl_3$ is ...... .

The coordination number and the oxidation state of the element $M$ in the complex $[M(en)_{2}(C_{2}O_{4})]NO_{2}$ [where $en$ is ethane-$1,2$-diamine] are respectively:

Which of the following species is not expected to be a ligand?

Which one of the following complexes will consume more equivalents of aqueous solution of $AgNO_3$?

An excess of $AgNO_3$ is added to $100 \ mL$ of a $0.01 \ M$ solution of dichlorotetraaqua-chromium$(III)$ chloride. The number of moles of $AgCl$ precipitated would be

What is the value of the primary valence of $Co$ in $CoCl_{3}$?