2. ACIDS-acids are
those chemical
substances which have
a sour taste. The acids
present in plant
materials and animals
are called organic
acids.

3. The acid prepared
form the minerals of
the earth are called
minerals acids .
Hydrochloric acids,
sulphuric acid and nitric
acid.

4. Please note that- the
carbonic acid is also a
minerals acid . But it is
a weak acid. All the
acid changes the color
of blue litmus to red.

5. BASES
Bases are those
chemical substances
which have a bitter
taste. All the bases
change the color of red
litmus to blue.

6. -Bases are the
chemical opposites of
acids .
-A base is a chemical
substances which can
neutralise an acid .

7. -Bases are the
chemical opposites of
acids .
-A base is a chemical
substances which can
neutralise an acid .