The oxidation state of platinum in $[Pt(NH_3)_5Cl]Cl_3$ is:

The $I.U.P.A.C.$ name of ${K_3}[Ir({C_2}{O_4})_3]$ is

The $IUPAC$ name of the complex $[Pt(NH_3)_2Cl_2]$ is

Select the correct $IUPAC$ name of $[Co(NH_3)_5(CO_3)]Cl$.

The oxidation states of iron atoms in compounds $(A),$ $(B)$ and $(C),$ respectively,are $x,$ $y$ and $z.$ The sum of $x, y$ and $z$ is........
$(A)$ $Na_4[Fe(CN)_5(NOS)]$
$(B)$ $Na_4[FeO_4]$
$(C)$ $[Fe_2(CO)_9]$

The formula for the complex tris(ethylenediamine)cobalt$(III)$ sulfate is .....