The $IUPAC$ name of $[Pt(NH_3)_4][PtCl_4]$ is:

The sum of oxidation states of two silver ions in $[Ag(NH_{3})_{2}][Ag(CN)_{2}]$ complex is $....$ .

Select the $CORRECT$ $IUPAC$ name of the complex compound $[Cr(NH_3)_5(CN)]_3[Ir(NO_2)_6]_2$.

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 oxidation state of nickel in the complex $K_4[Ni(CN)_4]$ is .......

State the $IUPAC$ name of the following complex: Sodium cobaltinitrite.