Answer by
fislamamt (189)
We can classify gasses aacording to the nature of the gasses. some gassses are always in the atmosphere in the elementary form. These are oxygen,nitrogen, hydrogen,helium and enert gases. Some gasses are produced by the reactions of the atmosspheric gases with other elements such as carbon . Nitrogen can make nitrous gases with oxgyen. Fluorine, chlorine are very reactive gases.