a) Classify the following in the acidic and basic oxides.
(`CaO, CO_2, MgO, SO_2`)
b) Name the gases found in large quantities in the materials expelled from the factories.
c) Which are the acid obtained when these gases dissolve in water?

Explanation

a) Acidic - .CO_2, SO_2.
Basic - .CaO, MgO.
b) .CO_2, SO_2, NO_2.
c) Carbonic acid (.H_2CO_3.), Sulphurous acid (.H_2SO_3.), Nitric acid (.HNO_3.)