Acid and base indicator

INDICATORS:

Indicators are the substances which are used to detect whether the given substances are acids or bases. Namely there are two types natural and synthesised indicators.

NATURAL INDICATORS: The indicators which we obtain directly from nature are called as natural indicators. Examples are litmus, turmeric, chinarose and so on.

SYNTHESISED INDICATORS: The indicators which are man made are called as synthesised indicators. Exampales are phenolphthalein, methyl orange and so on.