JEE Main202427 Jan 2024Evening ShiftChemistryAlcohols Phenols and EthersActual
Phenolic group can be identified by a positive:
Options
- APhthalein dye test
- BLucas test
- CTollen’s test
- DCarbylamine test
Correct answer
A. Phthalein dye test
Step-by-step solution
Carbylamine Test-Identification of primary amines Lucas Test - Differentiation between 1 ° , 2 ° and 3 ° alcohols Tollen's Test - Identification of Aldehydes Phthalein Dye Test - Identification of phenols Phenol on heating with phthalic anhydride in the presence of concentrated sulphuric acid forms a colourless condensation compound called phenolphthalein. On further reaction with dilute sodium hydroxide solution gives a pink colour fluorescent compound called fluorescein. Characteristic colours are produced by dif