As air is progressively cooled by your powerful refrigeration apparatus, it doesn't all liquefy at the same time. The carbon dioxide liquefies first, then the oxygen, then the nitrogen. You can separate these gases and demonstrate that they have very different properties.
The three properties of air that show it is a mixture are: (1) uniform composition, (2) components can be separated by physical means, and (3) each component retains its own properties in the mixture.
No. Air is a mixture.
Yes, air is a mixture. It is a homogeneous mixture.
Air is a homogeneous mixture.
Air is a homogeneous mixture.
Air is a mixture.
Air is a homogeneous mixture
Air is a homogeneous mixture.
Air is a mixture.
Air is a homogeneous mixture.
Air is a mixture of gases.
Air is a mixture of gases.