Question 47

Phenolic group can be identified by a positive:

Name: Phenolic group can be identified by a positive:
Uploaded: 2026-05-20T10:53:12.622593+05:30
Duration: 2 min 37 s
Description: Phenolic group can be identified by a positive:

Solution

Lucas test: Used to distinguish between primary, secondary, and tertiary aliphatic alcohols based on the time it takes to form an insoluble alkyl chloride turbidity using Lucas reagent ($$\text{ZnCl}_2 + \text{HCl}$$). Phenols do not react.

Tollen's test: Used to identify aldehydes (and reducing sugars) through the formation of a shiny silver mirror.

Carbylamine test: Used to detect primary amines ($$-\text{NH}_2$$ group) by generating a foul-smelling isocyanide compound.

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