Question

. Name any one compound that decomposes on heating to release oxygen.

Answer 1

Potassium chlorate (KClO₃) decomposes on heating to release oxygen.

• Potassium chlorate, when heated to 250 °C in the presence of the catalyst manganese dioxide (MnO₂), decomposes to give oxygen gas (O₂) and potassium chloride (KCI).
• The reaction is as follows: $\underset{\mathrm{Potassium}\mathrm{chlorate}}{2{\mathrm{KClO}}_3}\underset{{\mathrm{MnO}}_2}{\overset{∆}{\to }}\underset{\mathrm{Potassium}\mathrm{chloride}}{2\mathrm{KCl}}+\underset{\mathrm{Oxygen}}{3{\mathrm{O}}_2}$