What is the meaning of Olfactory Indicators?
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An Olfactory indicator is a substance whose smell varies depending on whether it is mixed with an acidic or basic solution. 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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There r some substances whose odour(smell) changes when put in acidic or basic media... Such substances can also be used to check acids or bases.... These substances are called olfactory indicators... Eg.. Clove oil, vanilla essence, onion
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