Question

Hydrogen peroxide is prepared in the laboratory by:

• A. passing $ C{{O}_{2}} $ into $ Ba{{O}_{2}} $
• B. adding $ Mn{{O}_{2}} $ to dil. $ {{H}_{2}}S{{O}_{4}} $
• C. adding $ N{{a}_{2}}{{O}_{2}} $ to cold water
• D. adding $ Pb{{O}_{2}} $ into $ KMn{{O}_{4}} $ .

Answer 1

Answer: (A)

Hydrogen peroxide is prepared by the action of $ C{{O}_{2}} $ on barium peroxide $ (Ba{{O}_{2}}) $ .
$\underset{\text{(Barium peroxide)}}{BaO_2} + CO_2 + H_2O \to \underset{\text{(Barium carbonate)}}{BaCO_3}$
$ + \underset{\text{(Hydrogen peroxide)}}{H_2O_2}$