Q36.Which of the following compound gives pink colour on reaction with phthalic anhydride in conc. H2SO4 followed by treatment with NaOH? JEE Main 2021 (24 Feb Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)
What This Question Tests
This question identifies the reactant (phenol) that undergoes condensation with phthalic anhydride in acidic conditions to form phenolphthalein, which shows a pink color in alkaline medium.
Concepts Tested
📚 NCERT Sections This Tests
7.17 — Give Equations Of The Following Reactions:
Chemistry Class 12 · Chapter 7
7.17 Give equations of the following reactions: (i) Oxidation of propan-1-ol with alkaline KMnO4 solution. (ii) Bromine in CS2 with phenol. (iii) Dilute HNO3 with phenol. (iv) Treating phenol wih chloroform in presence of aqueous NaOH.
7.14 — Give Two Reactions That Show The Acidic Nature Of Phenol. Compare Acidity
Chemistry Class 12 · Chapter 7
7.14 Give two reactions that show the acidic nature of phenol. Compare acidity of phenol with that of ethanol.
7.7 — Predict The Major Product Of Acid Catalysed Dehydration Of
Chemistry Class 12 · Chapter 7
7.7 Predict the major product of acid catalysed dehydration of (i) 1-methylcyclohexanol and (ii) butan-1-ol
📋 Question Details
- Chapter
- Alcohols Phenols Ethers
- Topic
- Phenolphthalein synthesis (Phthalein Dye Test)
- Year
- 2021
- Shift
- 24 Feb Shift 1
- Q Number
- Q36
- Type
- MCQ
- NCERT Ref
- Class 12 Chemistry Ch 11: Alcohols, Phenols and Ethers
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