Which of the following liberates $O_2$ upon hydrolysis?

Which of the following can reduce the decomposition of $H_2O_2$ on exposure to light?

$O_2F_2$ is an unstable yellow-orange solid and $H_2O_2$ is a colourless liquid. Both have an $O-O$ bond. The $O-O$ bond length in $H_2O_2$ and $O_2F_2$ respectively is:

The equation $H_2S + H_2O_2 \to S + 2H_2O$ represents:

The structure of $H_2O_2$ is

The $\% \left(\frac{W}{V}\right)$ of $H_2O_2$ in $1.5 \ N$ solution is