State the $IUPAC$ name of the following complex: $[Cr(C_2O_4)_3]^{3-}$

The $IUPAC$ name of $[Co(NH_3)_5(CO_3)]Cl$ is

The correct formula of potassium ferrocyanide is:

According to $IUPAC$ nomenclature,the correct name of the compound $[Cu(NH_3)_4](NO_3)_2$ is:

Which of the following formulae represents the trioxalatocobaltate$(III)$ ion?

Write the formulas for the following coordination compounds:
$(a)$ Tetraammineaquachloridocobalt $(III)$ chloride
$(b)$ Potassium tetrahydroxidozincate $(II)$
$(c)$ Potassium trioxalatoaluminate $(III)$
$(d)$ Dichloridobis(ethane$-1,2-$diamine)cobalt $(III)$
$(e)$ Tetracarbonylnickel $(0)$