Question

write down the difference indicator

Answer 1

(i) NATURAL INDICATOR :- Those indicators which are obtain from nature. ( Animals,Plants )  e.g :- Litmus paper (ii) SYNTHETIC INDICATOR :- those indicators which are prepare in laboratory synthetic indicators. (iii) OLFACTORY INDICATOR :- Those substances whose smell changes in acidic or basic solution are called olfactory indicator. e.g:- vanilla extract