What are olfactory indicators ? name some
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An Olfactory indicator is a material whose smell varies reliant on whether it is mixed with an acidic or basic solution. Olfactory indicators mainly used in the laboratory to test whether a solution is a base or an acid. Onion, clove oil and vanilla extract are examples of some olfactory indicators.
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The substances that show change in odour/smell in acidic and basic medium are know as olfactory indicators.
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The changes that occur are due to the acidic and basic nature of any substance. Examples:- vanilla essence, clove, onion, vinegar, etc.
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