Question

______________________________is used as a catalyst in the preparation of $\mathrm{Oxygen}\mathrm{gas}$ in laboratory.

Answer 1

• $\mathrm{Oxygen}\mathrm{gas}$ is produced by different methods by using different methods.
• In the laboratory, $\mathrm{Oxygen}\mathrm{gas}$ is prepared by the decomposition of $\mathrm{Hydrogen}\mathrm{peroxide}\left({\mathrm{H}}_2{\mathrm{O}}_2\right)$ by using $\mathrm{Magnese}\mathrm{dioxide}\left({\mathrm{MnO}}_2\right)$ a catalyst.
• Catalyst is a substance that does not take part in the chemical reaction but it will increase the rate of a chemical reaction without undergoing any chemical change.

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

Thus,$\mathrm{Magnese}\mathrm{dioxide}\left({\mathrm{MnO}}_2\right)$ is used as a catalyst in the preparation of $\mathrm{Oxygen}\mathrm{gas}$ in laboratory.