How can onion juice identify a base as an olfactory indicator?
Answer and explanation
Correct answer: Its smell can change or decrease in a base
An olfactory indicator is identified through a change in smell rather than a colour change. Onion juice has a characteristic smell, and in a basic medium that smell may become weaker or change, giving evidence that the substance is basic. Therefore, option A is correct. The claims about gold, water, or impossible detection do not describe olfactory-indicator behaviour.
Frequently asked questions
What is the correct answer to this question?
Its smell can change or decrease in a base
Why is this the correct answer?
An olfactory indicator is identified through a change in smell rather than a colour change. Onion juice has a characteristic smell, and in a basic medium that smell may become weaker or change, giving evidence that the substance is basic. Therefore, option A is correct. The claims about gold, water, or impossible detection do not describe olfactory-indicator behaviour.
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.
