JEE Main 2022ChemistryRedox ReactionsHardMCQ

JEE Main 2022 — Redox Reactions Question with Solution

JEE Main 2022 (29 Jul Shift 2)

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 CH3COOH. Compound 'X' exists in ionized form in basic medium. The compound 'X' is

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Show full solutionCorrect option: C
Correct answer
Cphenolphthalein

Step-by-step explanation

phenolphthalein, (C20H14O4), 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.

It is used for the titration of weak acid and strong base. Phenolphthalein is weak acid give colour in basic medium. It exist in ionized form in basic medium.

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About this question

This is a previous-year question from JEE Main 2022, covering the Redox Reactions chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.