Question

the four properties of air

Answer 1

1)air is a mixture of all gases
2)smoky air or dusty air exhibits the property of a colloid
3)air has no odor no colour etc
4)as the particles of gases are in motion the air exists the pressure which is called atmospheric pressure

Answer 2

1)air is a mixture of all gases
2)smoky air or dusty air exhibits the property of a colloid
3)air is invisible
4)pressure exerted by air is called atmospheric pressure