In the laboratory, $H_2O_2$ is prepared by:

Which of the following compounds is a peroxide?

The bond angle $H-O-O$ in $H_2O_2$ in the gaseous phase is (in $^{\circ}$)

Electrolysis of $X$ gives $Y$ at anode. Vacuum distillation of $Y$ gives $H_2O_2$. The number of peroxy $(O-O)$ bonds present in $X$ and $Y$ respectively are :

Decomposition of $H_2O_2$ is prevented by

Hydrogen peroxide is stored away from light because it can get decomposed when exposed to light as: