The smell of vanilla decreases in a base when used as an olfactory indicator. This observation is useful for identifying what?
Answer and explanation
Correct answer: A basic solution
The governing concept is the use of olfactory indicators. Such indicators provide evidence about a solution through a change in smell rather than a colour change. Vanilla’s odour becomes weaker in a basic medium, so this observation indicates a basic solution and makes option A correct. Metallic shine, boiling point, and water of crystallisation are unrelated properties and cannot be identified by this observation.
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What is the correct answer to this question?
A basic solution
Why is this the correct answer?
The governing concept is the use of olfactory indicators. Such indicators provide evidence about a solution through a change in smell rather than a colour change. Vanilla’s odour becomes weaker in a basic medium, so this observation indicates a basic solution and makes option A correct. Metallic shine, boiling point, and water of crystallisation are unrelated properties and cannot be identified by this observation.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
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