Question

It gives pink colour with phenolphthalein​

Answer 1

Answer:

Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions.

Answer 2

Answer:

Phenolphthalein, an acid-base indicator used to test the pH of a solution, turns pink due to the presence of a weak base. ... If the pH of the solution is 8.2 or above, the number of anions increases, causing the solution to turn pink.