define olfactory indicator with 2 eg
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An olfactory indicator is a substance which changes its smell on reacting with acids or bases.
ex. clove, onion, etc.
Onion loses it's smell when reacted with base
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An olfactory indicator is a substance whose smell varies depending on whether it is mixed with acidic or basic solutions.It is based on the sensation of smell to identify the substance.Some examples of olfactory indicators are onion, vanilla,clove oil etc
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