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  4. Assertion: Aryl sulphonic acid gives phenol on reacting with NaOH at high temperature. Reason: This reaction is electrophilic substitution reaction.

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Q. Assertion: Aryl sulphonic acid gives phenol on reacting with NaOH at high temperature.
Reason: This reaction is electrophilic substitution reaction.

AIIMSAIIMS 2013Alcohols Phenols and Ethers

Solution:

This is nucleophilic aromatic substitution reaction and occurs via the addition- elimination mechanism with $SO_3^{2-}$ as the leaving group.

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