MAHARASHTRA Class 9: Reactivity of Acids, Bases and Salts Videos | Acids, Bases and Salts

Lichens are used to make litmus paper. 

Mineral acid reacts with water and produces hydronium ions.

When zinc reacts with hydrochloric acid, it produces hydrogen. 

Carbon dioxide turns lime water milky. 

A neutralisation reaction occurs between an acid and a base, between an acid and a basic oxide, and between a base and acidic oxide.