Question

From which substances natural indicators are prepared? Explain any one in detail with procedure.

Answer 1

Natural indicators are prepared from red cabbage, turmeric, onion etc.

Procedure for the preparation of natural indicators-

- Cut the red cabbage into thin slices.

- Put the thin slices in a mixer and add water in it.

- Mix the ingredients properly.

- Put the stain in a glass.

-Prepared the solutions to be tested.

- Put the solutions in different glasses.

- Add red cabbage indicator in each glass.

- Arrange them in order of pH.

- Observe the colour changes in each glass.