Which of the following oxidizing agents is used as an antiseptic?

Why does the following reaction occur?
$XeO_6^{4-}{(aq)} + 2F^{-}{(aq)} + 6H^{+}{(aq)} \rightarrow XeO_{3_{(g)}} + F_{2_{(g)}} + 3H_2O_{(l)}$
What conclusion about the compound $Na_4XeO_6$ (of which $XeO_6^{4-}$ is a part) can be drawn from the reaction?

Which of the following is the strongest reducing agent?

Sulphur dioxide and hydrogen peroxide can act as both oxidizing and reducing agents in their reactions,while ozone and nitric acid act only as oxidants. Why?

The metal which can be used to obtain metallic $Cu$ from aqueous $CuSO_{4}$ solution is

Which of the following is not oxidized by $O_3$?