Question

What are olfactory indicators?


Explain by giving examples

Answer 1

Olfactory indicators are the indicator which tell the nature of the substance (whether it is acidic or basic) on the basis of its smell or odour.
ex- Most common indicator is onion

Answer 2

Olfactory indicators are a type of indicators which indicate whether a solution is acid or base on the basis of their smell. For example onion, clove, vanilla extract,etc. Like if you keep a sliced onion in a basic solution, it changes the smell of onion, whereas when put in an acidic solution, the smell of the onion is not lost.