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  • Which one of the following phenols does not give colour when condensed with phthalic anhydride in presence of conc.?Option: 1<

Which one of the following phenols does not give colour when condensed with phthalic anhydride in presence of conc.\mathrm{H_{2}SO_{4}}?
Option: 1
Option: 2
Option: 3
Option: 4

Answers (1)

best_answer

As we have learnt,

Phenol reacts with Phthalein anhydride to form Phenolphthalein.

The reaction occurs via electrophilic aromatic substitution at the para position of phenol as shown below

Thsus, para substituted Phenols will not show this reaction

 
Hence, the correct answer is Option (4).

Posted by

sudhir kumar

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