Among the following compounds, the one that gets hydrolysed to form metallic hydroxide, hydrogen peroxide and oxygen is:

Q. A metallic oxide reacts with water to form its hydroxide, hydrogen peroxide and also liberates oxygen. The metallic oxide could be :

Q. Assertion(A): The decomposition of hydrogen peroxide to form water and oxygen is an example of disproportionation reaction.

Reason(R): The oxygen of peroxide is in $-1$ oxidation state and it is converted to zero oxidation state in $O_2$ and $-2$ oxidation states in $H_{2}O$.

Q. The main oxides formed on the combustion of $Li,Na$ and $K$ in excess of air are, respectively:

Q. The oxide that gives hydrogen peroxide $\left(H_2{O}_2\right)$ on the treatment with a dilute acid $\left(H_2{SO}_4\right)$ is

Q. The oxidation number of oxygen in $K{O}_3,{Na}_2{O}_2$ is: