Question

Fill in the blank spaces by choosing the correct words from the given list.

List : Sulfurous, nitric acid, slowly, oxygen, phosphoric

Potassium nitrate crystals on heating strongly, yield potassium nitrite and ____________ gas.

Answer 1

• The given reaction is:

$\underset{\mathrm{Potassium}\mathrm{nitrate}\mathrm{Potassium}\mathrm{nitrite}\mathrm{Oxygen}}{2{\mathrm{KNO}}_3\stackrel{∆}{\to }2{\mathrm{KNO}}_2+{\mathrm{O}}_2}$

• Potassium nitrate is decomposed by giving heat and produces ${\mathrm{KNO}}_2$ and ${\mathrm{O}}_2$.
• This is an example of a decomposition reaction.

Therefore, potassium nitrate crystals on heating strongly, yield potassium nitrite and oxygen gas.