Which of the following is a double salt?

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

Explain the terms 'Coordination Entity' and 'Central Atom/Ion' in the context of coordination compounds.

The correct order of the stoichiometries of $AgCl$ formed when $AgNO_3$ in excess is treated with the complexes $CoCl_3 \cdot 6NH_3$,$CoCl_3 \cdot 5NH_3$,and $CoCl_3 \cdot 4NH_3$ respectively is:

Which of the following species is $NOT$ a monodentate ligand?

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