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.
Frequently asked questions
What is the correct answer to this question?
It disappears or decreases
Why is this the correct answer?
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.
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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