what are olfactory indicators? give examples.
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olfactory indicators are used to detect substances by smell
eg onions
DeySuchi:
hi
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Olfactory indicators is a substance whose smell varies depending on whether it is mixed with an acidic and basic solution.It can be used in the laboratory to test whether the solution is a base or an acid this process is called olfactory indicators.
Onion,Clove oil , vanilla are some example..
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