what are offactory indicators? give example.
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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. Onion , clove oil and vanilla extract are examples.
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These are the substance who's odor (smell) change in acidic or basic media. Eg. Onion ,venilla ,clove oil
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