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What happens to vanilla smell in a basic solution?

Answer and explanation

Correct answer: It disappears or decreases

Vanilla essence is used as an olfactory indicator in school-level acid-base tests. Its characteristic smell becomes faint or disappears in a basic solution, making option A correct. The other choices confuse smell with colour or with a precipitate: a smell does not become red or blue, and this observation does not mean that a solid precipitate forms.

Related tags

ScienceClass 10Acids Bases SaltsVanillaOlfactory IndicatorAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And Behaviour

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