NEET2026Chemistry-Organic Chemistry
NEET 2026 Chemistry Functional Group Identification MCQ Question
Type: MCQ-conceptual-Medium-Class 11
The functional group that can be identified through phthalein dye test is:
A
Aldehyde
B
Phenolic
C
Carboxylic acid
D
Alcohol
Correct Answer
Option 2
Detailed Explanation
Phthalein Dye test: Phenol on heating with phthalic anhydride in presence of concentrated sulphuric acid forms a colourless condensation compound called phenolphthalein. On further reaction with NaOH it gives pink colour. So phenolic group is correct answer.
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