Question

What do you mean by Olfactory indicators ?​

Answer 1

Explanation:

this are chemical indicators for the test of acid or basic nature

Answer 2

Answer:

An Olfactory indicator is a substance whose smell varies depending on whether it is mixed with an acidic or basic solution. Simply put, olfactory indicators are substances which have a different odour in acid and base solutions. For eg: Vanilla extract has a characteristic pleasant smell, onion and clove oil, etc.