$[EDTA]^{4-}$ is a .......

Which of the following is an example of a hexadentate ligand?

Mohr's salt is

The coordination number of $Cu$ in the complex $[Cu(H_2O)_4]^{2+}$ is:

$A$ coordination complex compound of cobalt has a molecular formula containing five ammonia molecules,one nitro group,and two chlorine atoms for one cobalt atom. One mole of this compound produces three moles of ions in an aqueous solution,and upon reacting with an excess of $AgNO_3$,it forms $AgCl$ precipitate. The ionic formula for this complex would be:

$A$ $Pt$ complex of ammonia and chlorine that produces four ions per molecule in the solution is