Question

three reasons to why air is a mixture

Answer 1

(i) Air can be separated into its constituents like oxygen, nitrogen etc. by the physical process of fractional distillation.

(ii) Air shows the properties of all the gases present in it.

(iii) Air has a variable composition.

(iv) Liquid air does not have a fixed boiling point.

Answer 2

air is not a mixture because of scientist freezing it and finding different liquid is it is a mixture because the compounds that make up a example oxygen O2 and carbon dioxide CO2 and nitrogen which is the element having 78.9 portion of the air.
1 air is necessary for everyone that is plant need nitrogen and animal need O2
2 Helium gases are used for making cases I mean for making air ballons.
3 Nitrogen gas is also used for Packaging of material eg chips .is nitrogen is almost an reactive element .

HOPE THIS ANSWER WILL HELP U BUDDY

IF U LIKE IT THAN MARK IT AS BRAINLIEST