The decomposition of $H_2O_2$ can be prevented by adding which of the following?

Which of the following acts as both an oxidizing agent and a reducing agent?

The strengths of $5.6$ volume hydrogen peroxide (of density $1 \ g/mL$) in terms of mass percentage and molarity $(M)$,respectively,are:
(Take molar mass of hydrogen peroxide as $34 \ g/mol$)

What is the product of the reaction of $H_2O_2$ with $Cl_2$?

The normality of $30$ volume $H_2O_2$ is (in $N$)

Which statement is false about $H_2O_2$?