Which of the following oxides produces $H_2O_2$ when treated with $HCl$?

Which metal oxide among the following gives $H_2O_2$ on treatment with dilute acid?

Which of the following is a true structure of $H_2O_2$?

Which of the following yields $H_2O_2$ upon oxidation?

When $H_{2}O_{2}$ is shaken with an acidified solution of $K_{2}Cr_{2}O_{7}$ in the presence of ether, the ethereal layer turns blue due to the formation of

The reaction of $H_{2}O_{2}$ with potassium permanganate in acidic medium leads to the formation of mainly.