What are the differences between olfactory and synthetic indicators?
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An indicator gives different colours in acid and base and thus it is used for testing acids and bases. A natural indicator is obtained from natural sources while synthetic indicators are man made and do not occur in nature. Litmus is a natural indicator which is extracted from a type of plant called lichen.
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Answer:
olfactory indicator are the PH indicator s can be tested through the smell
synthetic indicator s are man made
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