Question

3. a) Define indicators​

Answer 1

${\huge{\underline{\red{INDICATOR}}}}$

• Those chemical substances (dyes) which behave differently in acidic and basic medium and indicate by physical changes(colour, odour). Three common indicators are litmus, phenolphthalein and methyl orange.

Answer 2

Answer:

Explanation:

Substance or solution which change colour with change in solution or medium . It occur due to change in h+ or oh_ ions.eg. acidified kmno4, it is self indicator