what are the olfactory indicator ?name two substances which can be used as olfactory indicators.
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Olfactory indicators are substances which helps to distinguish subsatnces as acids or base on the basis of smelling sense.
Eg. vanilla essence ,onion ,clove oil etc.
Eg. vanilla essence ,onion ,clove oil etc.
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Olfactory indicators can be used in the laboratory to test whether a solution is a base or an acid, a process called olfactory titration.
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