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

$A$ sample of $H_2O_2$ solution has a volume of $100 \, cm^3$ and it produces $1000 \, cm^3$ of $O_2$ gas at $STP$. What is the volume strength of the given $H_2O_2$ sample?

The strength of $11.2$ volume solution of $H_2O_2$ is: [Given that molar mass of $H = 1 \ g \ mol^{-1}$ and $O = 16 \ g \ mol^{-1}$]

$H_2O_2$ will oxidise:

How many $mL$ of perhydrol is required to produce sufficient oxygen which can be used to completely convert $2 \ L$ of $SO_2$ gas to $SO_3$ gas (in $mL$)?

In the laboratory, $H_2O_2$ is prepared by: