The product$(s)$ formed when $H_2O_2$ reacts with disodium hydrogen phosphate is

To an aqueous solution of $AgNO_3$,some $NaOH_{(aq)}$ is added until a brown precipitate is obtained. To this,$H_2O_2$ is added dropwise. The precipitate turns black with the evolution of $O_2$. The black precipitate is:

An acidic solution of hydrogen peroxide behaves as an oxidising as well as reducing agent. Illustrate it with the help of a chemical equation.

Phosphoric acid is preferred over sulphuric acid in preparing hydrogen peroxide from peroxides. Why?

The decomposition of $H_2O_2$ can be prevented by adding which of the following?

$6.8 \, g$ of $H_2O_2$ is dissolved in $0.2 \, L$ of solution. Then the solution will be labelled as ............. $V$ volume strength.