$KO_2 + H_2O \to KOH + O_2 +$ product $(X)$. Choose the correct statement about product $(X)$.

$3.4 \ g$ of $H_2O_2$ is present in its $112 \ mL$ solution. The volume strength of this solution is ....... $V$.

In the following reaction,identify the nature of the product formed by the complete hydrolysis of the underlined atom at $R.T.$:
${H_2}{\underline{S}}_2{O_8} + {H_2}O \longrightarrow {H_2}S{O_4} + {H_2}O_2$

The oxidation states of the most electronegative element in the products of the reaction of $BaO_2$ with dilute $H_2SO_4$ are

Fill in the blanks:
$(1)$ $H_2O_2$ acts as an antiseptic, then it is known as ......... in the market.
$(2)$ Cation exchange resin is a ......... group containing organic molecule.
$(3)$ The ionic radius of $H^+$ ions and that of other ions is ......... $pm$ and ......... $pm$ respectively.
$(4)$ ......... group elements give salt-like hydrides.

Write chemical reactions to justify that hydrogen peroxide can function as an oxidizing as well as a reducing agent.