1. (a) Litmus is extracted from Lichens. (b) Litmus is used as an acid-base indicator. (c) Acids turn blue litmus red. (d) Bases turn red litmus blue.

    (a) Litmus is extracted from Lichens.
    (b) Litmus is used as an acid-base indicator.
    (c) Acids turn blue litmus red.
    (d) Bases turn red litmus blue.

    See less
    • 7
  2. When an acid solution reacts with a base or metal, so as to form salt, the reaction is called neutralisation reaction.

    When an acid solution reacts with a base or metal, so as to form salt, the reaction is called neutralisation reaction.

    See less
    • 6