Identify the colour of compound 'X' in the sequence of the reaction: 2 phenol + phthalic anhydride conc. H₂SO₄ phenolphthalein NaOH quinonoid dianion (Pink) Excess NaOH X (carbinol trianion with C–OH, two phenoxide groups and a carboxylate)

Principles Related to Practical Chemistry: JEE Main 2026 Chemistry question

JEE Main 2026 · 4 Apr, Morning shift · Q70

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Identify the colour of compound 'X' in the sequence of the reaction: 2 phenol + phthalic anhydride

\xrightarrow{\text{conc. }\mathrm{H_2SO_4}}

phenolphthalein

\xrightarrow{\mathrm{NaOH}}

quinonoid dianion (Pink)

\xrightarrow{\text{Excess NaOH}}

X (carbinol trianion with C–OH, two phenoxide groups and a carboxylate)

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