Question

Define olfactory indicators. Give two examples

Answer 1

Explanation:

An Olfactory indicator is a substance whose smell varies depending on whether it is mixed with an acidic or basic solution. Olfactory indicators can be used in the laboratory to test whether a solution is a base or an acid, a process called olfactory titration. Onion , clove oil and vanilla extract are examples.

Answer 2

The substance whose smell changes in acidic or basic solutions are called olfactory indicators. An olfactory indicator usually works on the principle that when an acid or base is added, it loses its characteristic smell.

eg: onion, vanilla