The oxide that gives hydrogen peroxide $H_2O_2$ on treatment with a dilute acid $H_2SO_4$ is:

Addition of $H_{2}SO_{4}$ to $BaO_{2}$ produces

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

Predict the correct product when $Cl_2$ is passed through a $H^{18}O-^{18}OH$ solution.

Which of the following statements regarding $H_2O_2$ is correct?

Assertion: Sulfur is oxidized by $H_2O_2$ in the presence of $Fe(III)$.
Reason: $Fe(III)$ catalyzes the oxidation of sulfur to sulfate.