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

State the $IUPAC$ name of the following complex: $[Ph_4As][PtCl_2(H)(CH_3)]$

The chemical formula of diammine silver $(I)$ chloride is

The $IUPAC$ name for $[(NH_3)_5Cr(OH)Cr(NH_3)_5]^{5+}$ 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 correct $IUPAC$ name of $K_2MnO_4$ is