Question

The catalyst used in preparation of oxygen from hydrogen peroxide is:

• A. manganese dioxide
• B. magnesium oxide
• C. manganese oxide
• D. manganese sulphate

Answer 1

The correct option is A manganese dioxide

Manganese dioxide lowers the activation energy which makes the reaction of decomposition of hydrogen peroxide to oxygen fast. It allows more molecules of $H_2{O}_2$ to undergo decomposition in a shorter period of time.

Balanced chemical equation of reaction is $2H_2{O}_2\left(aq\right)\stackrel{Mn{O}_2\left(s\right)}{\to }2H_{2}O\left(l\right)+O_2\left(g\right)$