Question

$H_{2}O_{2}$ is prepared in the laboratory when -

• A. $MnO_{2}$ is added to dilute cold $H_{2}SO_{4}$
• B. $BaO_{2}$ is added to $CO_{2}$ bubbling through cold water
• C. $PbO_{2}$ is added to an acidified solution of $KMnO_{4}$
• D. $Na_{2}O_{2}$ is added to boiling water

Answer 1

Answer: (B)

When a rapid stream of $CO_{2}$ is bubbled through solution of $BaO_{2}$ in ice-cold water, $H_{2}O_{2}$ and $BaCO_{3}$ are produced.