Question

What do you mean by Olfactory indicators ?​

Answer 1

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Olfactory indicator is a substance whose smell varies depending on whether it is mixed with an acidic or basic solution.

Answer 2

Explanation:

An Olfactory indicator is a substance whose smell varies depending on whether it is mixed with an acidic or basic solution. ... Simply put, olfactory indicators are substances which have a different odour in acid and base solutions. For eg: Vanilla extract has a characteristic pleasant smell, onion and clove oil, etc.