What is an Indicator Give Examples

Answer: Indicators

• The chemical substances that indicate whether a compound is acidic or basic by changing its colour are called Indicators.
• The indicators when added to an acidic or basic solution change the colour of the solution depicting which are acids and which are bases.
• The nature of the solution can be detected using indicators.

Natural Indicator

The indicators obtained from the plants are called natural indicators.

For example- China rose, red cabbage, turmeric, and Hydrangeas is a flower that helps determine the nature of the solution. This flower turns blue if the soil is acidic and pink if the soil is basic and neutral.

Universal Indicator

The indicators that prepared synthetically mixing organic dyes that represent different colours at different concentrations of H+ ion in a solution

For example- Litmus paper or pH paper.