The volume of oxygen liberated at $\mathrm{STP}$ on complete decomposition of $400 \mathrm{mL}$ of $4 \mathrm{M} {\mathrm{H}}_2{\mathrm{O}}_2$ is:

The volume of oxygen liberated from $0.68 \mathrm{g}$ of ${\text{H}}_{\text{2}}{\text{O}}_{\text{2}}$ is_____        

[MH CET 2014]

i. ${\mathrm{H}}_{\mathrm{2}}{\mathrm{O}}_{\mathrm{2}} + {\mathrm{O}}_{\mathrm{3}} \to {\mathrm{H}}_{\mathrm{2}}\mathrm{O} + 2{\mathrm{O}}_{\mathrm{2}}$

ii. ${\mathrm{H}}_{\mathrm{2}}{\mathrm{O}}_{\mathrm{2}} + {\mathrm{Ag}}_{\mathrm{2}}\mathrm{O} \to 2\mathrm{Ag} +{\mathrm{H}}_{\mathrm{2}}\mathrm{O} + {\mathrm{O}}_{\mathrm{2}}$

Role of hydrogen peroxide in the above reactions is respectively    
[AIPMT 2014]

In which of the following reaction hydrogen peroxide is a reducing agent?    

[BHU 1995]

Which of the following gas is insoluble in water?    

[Pb. CET 2003]