JEE Main 2022 Chemistry question

A compound 'X' is a weak acid and it exhibits colour change at pH close to the equivalence point during neutralization of NaOH with . Compound 'X' exists in ionized form in basic medium. The compound 'X' is :

(1)methyl orange
(2)methyl red
(3)phenolphthaleinCorrect
(4)erichrome Black T

Answer: (3)

Solution

The equivalence point of the titration of acetic acid (weak acid) with NaOH lies in the basic region, so an indicator that

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Question ID VK-035035