Question

16. What is an indicator? Name three common indicators

Answer 1

Indicators r the weak inorganic compounds which change colour in accordance with the pH of the solution. Indicators dissociate slightly in a solution producing ions and dissociated molecules. The colour of the ions is dependent on the hydrogen ion concentration. The three common indicators are: 1.Litmus paper. 2.Methyl orange. 3.Universal indicators.

Answer 2

An indicator is a substance that changes its colour in acidic and basic medium. An indicator shows one colour in acidic medium and different colour in basic medium so that they are called indicator.
The three common indicator are
1.litmus
2.Methyle orange
3.phenolphthalein.