The volume of oxygen liberated from $15 \, mL$ of $20$ volume $H_2O_2$ is ................ $mL$.

Which method is currently used for the industrial production of $H_2O_2$?

Decomposition of $H_2O_2$ is prevented by

What is the approximate volume (in $mL$) of $10$ vol $H_2O_2$ solution that will react completely with $1 \ L$ of $0.02 \ M \ KMnO_4$ solution in acidic medium?

The volume concentration of hydrogen peroxide having $6.8 \%$ concentration will be

Which is not a method to prepare $H_2O_2$?