Question

brt Answer Type Questions
16. (a) What is an indicator ? Name three common indicators.
(b) Name the acid-base indicator extracted from lichen.
( What colour does the turmeric paper turn when put in​

Answer 1

a substance that change their colour on acid or basic is called indicator.

turmeric,China rose ,litmus paper

b.

Answer 2

A thing that indicates the state or level of something.

litmus, The three comon indicators are phenolphthalein,bromothymol blue .