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What are olfactory indicators? |
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Answer» There are certain substances whose odour (smell)changes in acidic or basic solutions. These substances are called olefactory indicators. The olefactory indicators have a characteristics odour. This odour in olefactory indicators is changed in acidic or basic solution and helps us in detecting whether a given sample solutions is acidic or basic in nature. Ex : Vanilla essence has characteristic pleasant smell in acid solution and no smell in alkali solution. |
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