The oxidation state of $Mo$ in its oxo-complex species $[Mo_2O_4(H_2O)_2(C_2H_4)_2]^{2-}$ is :

The formula of pentaaquanitratochromium$(III)$ nitrate is,

$A$ complex whose $IUPAC$ name is not correctly written is:
Complex $ - $ Name

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

State the $IUPAC$ name of the following complex: $[CuCl_{2}(CH_{3}NH_{2})_{2}]$

Write the formulas for the following coordination compounds:
$(i)$ Tetraamminediaquacobalt$(III)$ chloride
$(ii)$ Potassium tetracyanidonickelate$(II)$
$(iii)$ Tris(ethane$-1,2-$diamine)chromium$(III)$ chloride
$(iv)$ Amminebromidochloridonitrito$-N-$platinate$(II)$
$(v)$ Dichloridobis(ethane$-1,2-$diamine)platinum$(IV)$ nitrate
$(vi)$ Iron$(III)$ hexacyanidoferrate$(II)$