The oxidation state of platinum in $[Pt(NH_3)_5Cl]Cl_3$ is:

In ammonium phosphomolybdate,the oxidation state of $Mo$ is $..........$.

$K_3[Fe(CN)_6]$ is called

The oxidation number of cobalt in $K[Co(CO)_4]$ is

Identify true and false statements:
$(a)$ In the reaction $F_2 + O_2 \to O_2F_2$,oxygen is an oxidising agent.
$(b)$ Among $HClO, HClO_2, HClO_3$ and $HClO_4$,$HClO_2$ is the strongest acid.
$(c)$ Oxidation state of Nickel in $[Ni(CO)_4]$ is zero.
$(d)$ The reaction $BaO_2 + H_2SO_4 \to BaSO_4 + H_2O_2$ is a redox reaction.
The correct order of truth values is:

What is the oxidation state of the central metal ion in the $\left[ Fe(CN)_6 \right]^{4-}$ complex?