Question

Oxygen can be obtained by the decomposition of hydrogen peroxide.

• A. True
• B. False

Answer 1

The correct option is A True

Decomposition reaction:

• A substance decays to form its smaller basic components. The general equation is,

$\mathrm{AB}\to \mathrm{A}+\mathrm{B}$

Decomposition of hydrogen peroxide:

• The chemical equation for the decomposition of hydrogen peroxide indicates that two molecules of hydrogen peroxide break down to generate two molecules of water and one molecule of oxygen gas, as well as heat energy.
• The chemical equation is as follows:

$\underset{\mathrm{Hydrogen}\mathrm{peroxide}}{2{\mathrm{H}}_2{\mathrm{O}}_2\left(\mathrm{l}\right)}\stackrel{{\mathrm{MnO}}_2}{\to }\underset{\mathrm{Water}}{2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}+\underset{\mathrm{Oxygen}}{{\mathrm{O}}_2\left(\mathrm{g}\right)}$

• This reaction generally proceeds slowly and hence the catalyst manganese dioxide is used here as well.

Hence, the given statement is true.