Question

Q-1) show that non metallic oxides are acidic in nature with the help of a reaction

Answer 1

This is because the oxides of metals form hydroxides in their aqueous solutions. ... (When metal oxides reacts, they produces either OH- ions or H+ ions. they both are basic in nature). Where as, when non metallic reacts with oxides, they produces acidic oxides.

Answer 2

When non metallic oxide for example SO2 (non metal) is dissolved in water it produces sulphurous acid which is acidic in nature.

SO2 + H2O → H2SO3

When metallic oxide (metal) reacts with water it produces metal hydroxides that are basic in nature.

Na2O + H2O → 2NaOH

You can check the nature by using a litmus paper. In the case of sulphurous acid, the blue litmus turns red indicating that it is acidic.