JEE · NEET Previous Year Question
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Phenolphthalein is a pH dependent indicator, remains colourless in acidic solution and gives pink colour in basic medium
Reason R : Phenolphthalein is a weak acid. It doesn't dissociate in basic medium.
In the light of the above statements, choose the most appropriate answer from the options given below:
Topic: JEE PYQ
Answer: C. Full step-by-step solution below.
- ABoth A and R are true and R is the correct explanation of A
- BBoth A and R are true but R is NOT the correct explanation of A.
- CA is true but R is false
- DA is false but R is true
Correct answer: C
Solution
(c)Phenolphthalein dissociate in basic medium
(colourless) (Pink)