Olfactory indicators give signals in acids and bases based on what change?
Answer and explanation
Correct answer: Change in smell
Olfactory indicators are substances whose characteristic smell changes, becomes weak, or may disappear in acidic or basic media. The indicator therefore provides information through the sense of smell rather than through a colour change. Onion and vanilla are common school-level examples. Option A is correct. An indicator does not lose all mass, form a metal, or make water disappear merely because it is placed in an acid or base.
Frequently asked questions
What is the correct answer to this question?
Change in smell
Why is this the correct answer?
Olfactory indicators are substances whose characteristic smell changes, becomes weak, or may disappear in acidic or basic media. The indicator therefore provides information through the sense of smell rather than through a colour change. Onion and vanilla are common school-level examples. Option A is correct. An indicator does not lose all mass, form a metal, or make water disappear merely because it is placed in an acid or base.
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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