In $K_4[Ni(C_2O_4)_3]$,what is the sum of the coordination number and the oxidation number of $Ni$?

If $N$ is bonded to the central metal atom in $SCN^-$,what will be the name of this ligand?

Which of the following ligands can form a chelate?

$A$ $1:3$ electrolyte in an aqueous solution is

The number of ions produced in an aqueous solution by the compound $[Co(NH_3)_4Cl_2]Cl$ is ..........

If the addition of $AgNO_3$ to a solution of $Co(NH_3)_5Cl_3$ results in the precipitation of $AgCl$ corresponding to two ionizable chloride ions,it means that ..............