Question

What all factory indicator .explan

Answer 1

Well there is a typing mistake it's olfactory indicator not all factory nvm Well they are indicator which indicate whether the given substance is acidic or basic on the basis of odour like they give different odour for acids and bases Hope this helped u ☺

Answer 2

Answer:

An all factory indicators are usually defined as those substances which smell changes in both acidic and basic solution. They mainly indicate in showing that whether the given substance is acidic or basic. This is mainly identified on the basis of the odor of the substances, which forms different colors.