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Question

Sulphonation of phenol at 373 K gives :


A

2-phenol sulphonic acid

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B

Phenol sulphonic acid

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C

4-phenol sulphonic acid

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D

3-phenol sulphonic acid

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Solution

The correct option is C

4-phenol sulphonic acid


Sulphonation of phenol at high temperature gives predominantly para isomer i.e. 4-phenol sulphonic acid.


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