The oxidation number of phosphorus in $Ba(H_2PO_2)_2$ is $:-$

Fill in the blanks:
$(1)$ Oxidation number of $Cr$ in $Na_3Cr_3O_{10}$ is ........
$(2)$ Oxidation number of $H$ in lithium aluminum hydride $(LiAlH_4)$ is .......
$(3)$ Oxidation number of oxygen in potassium ozonide $(KO_3)$ is .........
$(4)$ Oxidation number of $C$ in fullerene and graphite is .......

What are the oxidation numbers of sulfur in $S_8$,$S_2F_2$,and $H_2S$ respectively?

Sulphur has the highest oxidation state in

In $Na_2S_4O_6$,the oxidation number of $S$ is

The oxidation number of $Cr$ in $K_3CrO_8$ is $+5$. How many peroxy linkages are present in this molecule?