Decomposition of $H_2O_2$ is prevented by

Which is not a method to prepare $H_2O_2$?

How many millilitres of $20$ volume $H_2O_2$ solution is needed to react completely with $500 \ mL$ of acidified $1 \ N \ KMnO_4$ solution?

$H_2O_2$ is a

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

The orange coloured compound formed when $H_2O_2$ is added to $TiO_2$ solution acidified with conc $H_2SO_4$ is