What is the product formed when $I_2$ reacts with $H_2O_2$ in a basic medium?

Assertion $(A)$: The colour of old lead paintings can be restored by washing them with a dilute solution of $H_2O_2$.
Reason $(R)$: Hydrogen peroxide reduces $PbS$ to $Pb$.

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

Which one of the following is a true peroxide?

$I. \, H_2O_2 + O_3 \rightarrow H_2O + 2O_2$
$II. \, H_2O_2 + Ag_2O \rightarrow 2Ag + H_2O + O_2$
The role of hydrogen peroxide in the above reactions is respectively:

$H_2O_2$ is manufactured these days by