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 a

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

TestHub · Accepted Answer

Phenolphthalein, ( C 20 H 14 O 4 ) , an organic compound of the phthalein family that is widely employed as an acid-base indicator. As an indicator of a solution’s pH, phenolphthalein is colourless below pH 8 . 5 and attains a pink to deep red hue above pH 9 . 0 . Phenolphthalein dissociate in basic medium HPh aq colourless ⇌ H + + Ph - Pink

Chemistry - Ionic Equilibrium Question with Solution | TestHub

Options:

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