AIIMS2008Chemistry-Organic Chemistry
AIIMS 2008 Chemistry Dyes and Pigments MCQ Question
Type: MCQ-conceptual-Medium-Class 12
When phenol reacts with phthalic anhydride in presence of H₂SO₄ and heated and hot reaction mixture is poured in NaOH solution, then product formed is
A
alizarin
B
methyl orange
C
fluorescein
D
phenolphthalein
Correct Answer
Option D
Detailed Explanation
Phenol couples with phthalic anhydride in presence of conc. H2SO4 to form phenolphthalein which is used as an indicator.
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