What are olfactory indicators?give some examples.
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olfactory indicators are those indicators whose smell varies depending on wether it is added. in acidic or basic solution.example onion,clove oil
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These are substances whose smell changes based on the solutions being either acidic or basic. They are olfactory indicators.
eg. Vanilla extract has a pleasant smell. thus, an acidic solution does not destroy this pleasant smell but a basic solution can.
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