Question

what is an acid base indicator give example of natural and synthetic acid indicators

Answer 1

An acid-base indicator is either aweak acid or weak base that exhibits a color change as the concentration of hydrogen (H+) or hydroxide (OH-) ions changes in an aqueous solution.Acid-base indicators are most often used in a titration to identify the endpoint of an acid-base reaction. They are also used to gauge pH values and for interesting color-change science demonstrations.
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Answer 2

An acid base indicator is a dye that gives diff colours according to acid and base.
natural indicator - Litmus
synthetic - methyl orange