The $IUPAC$ name of $Na_{3}[Co(NO_{2})_{6}]$ is

The formula of the complex $Tris(ethylenediamine)cobalt(III)$ sulphate is:

The $IUPAC$ name for $[PtCl(NH_2CH_3)(NH_3)_2]Cl$ is

The $IUPAC$ name of ${K_2}[Cr(CN)_2(O_2)(O)_2(NH_3)]$ is

Using $IUPAC$ norms,write the formulas for the following:
$(i)$ Tetrahydroxozincate $(II)$
$(ii)$ Potassium tetrachloridopalladate $(II)$
$(iii)$ Diamminedichloridoplatinum $(II)$
$(iv)$ Potassium tetracyanonickelate $(II)$
$(v)$ Pentaamminenitrito$-O$-cobalt $(III)$
$(vi)$ Hexaamminecobalt $(III)$ sulphate
$(vii)$ Potassium tri(oxalato)chromate $(III)$
$(viii)$ Hexaammineplatinum $(IV)$
$(ix)$ Tetrabromidocuprate $(II)$
$(x)$ Pentaamminenitrito$-N$-cobalt $(III)$

The $IUPAC$ name of $Na_3[Co(ONO)_6]$ is .....