Question

Fill in the blanks:

Air is a _____ of several gases.

Answer 1

1. Mixture: The substance having two or more elements or compounds that combine physically and not chemically are called mixtures.
2. Example: 1. Air is a mixture of gases like Oxygen ($\mathrm{O}$), Nitrogen ($\mathrm{N}$), Argon ($\mathrm{Ar}$), Carbon dioxide (${\mathrm{CO}}_2$), and water vapour.
   2. Gun powder is a mixture of potassium nitrate (${\mathrm{KNO}}_3$), Sulphur and charcoal.

Therefore, Air is a mixture of several gases.