What is the oxidation state of iodine in $I_2Cl_6$?

The oxidation number of carbon in graphite is ....... .

The oxidation state of $P$ in $KH_2PO_2$ is .........

What is the oxidation state of osmium $(Os)$ in $OsO_4$?

In the following reaction,assign the state for the underlined atom for the product of complete hydrolysis at $R.T.$:
$\underline{Cl}F + H_2O \longrightarrow HOCl + HF$

Oxidation number of $As$ atoms in $H_3AsO_4$ is