Question

is air a impure or pure substances plz tell fast​

Answer 1

air is a mixture of several gasses including oxygen carbon dioxide nitrogen and other gases in small amounts and all of them are not in a definite ratio at all the places near the factories are the industries carbon dioxide levels are high near some special kind of soils acidity in soil is Heights so we cannot say that air is homogeneous and that is why we always say that air is heterogeneous

Answer 2

yes air can impure and pure example of this is like factories made in plastic and coming polluted air there is carbon and the air not polluted like oxygen air is a mixture also of many gases like Hydrogen ,oxygen ,carbon, nitrogen etc.