Reaction of phenol with chloroform in presence of dilute sodium hydroxide finally introduces which one of the following functional group?

2 2015 AIPMT-II Alcohols, Phenols and EthersReactions of phenol Easy
Reaction of phenol with chloroform in presence of dilute sodium hydroxide finally introduces which one of the following functional group?
A $-CHCl_2$
B $-CHO$
C $-CH_2Cl$
D $-COOH$

Detailed Solution

This is the Reimer–Tiemann reaction: phenol + $CHCl_3$ + NaOH, followed by acidification, gives salicylaldehyde (o-hydroxybenzaldehyde).
So a –CHO group is introduced.

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