NEET · Chemistry —

Alcohols Phenols and Ethers appeared 3 times across 1 year — 6.7% of Chemistry. This question is from Chemical Tests for Phenols.

Year 2026 Total
Questions 3 3
Practice all Alcohols Phenols and Ethers questions → View full NEET weightage & trends →

The functional group that can be identified through phthalein dye test is :

Solution & Explanation

Core Logic

Phthalein Dye Test: Phenol on heating with phthalic anhydride in the presence of concentrated sulphuric acid forms a colourless condensation compound called phenolphthalein. On further reaction with a base (like NaOH), it yields a deep pink (or red) coloured solution due to the formation of its sodium salt. This test is highly specific to the phenolic group.

Step 1: Final Conclusion

The functional group identified is Phenolic.

Pattern Recognition

Phthalein dye test = Phenol. Tollens'/Fehling's = Aldehyde. Lucas = Alcohols. Bicarbonate test = Carboxylic Acid.

Chapter Mix

Class 12 Chemistry: Alcohols, Phenols and Ethers Class 12 Chemistry: Practical Chemistry

Reference Study Guides

Alcohols Phenols And Ethers

More Alcohols, Phenols and Ethers Previous-Year Questions

More Alcohols, Phenols and Ethers Questions — neet_2026_03_may_morning

Practice all Alcohols, Phenols and Ethers previous-year questions →

Rankbit System
JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%) | JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%)