What are 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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An Olfactory indicator is a substance whose smell varies depending on whether it is mixed with an acidic or basic solution .
❥ E.g - Vanilla and onion
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