Q. Sulfonation of benzene with excess sulfuric acid provides

 3705  188 KEAMKEAM 2019Hydrocarbons Report Error

Solution:

Sulfonation of benzene with excess sulfuric acid provides -benzenedisulfonic acid. Initially, the replacement of a hydrogen atom from benzene ring by a sulphonic acid group occur, that results in the formation of benzenesulphonic acid. As excess of sulphonic acid is present in mixture, the reaction continues and form -benzene disulfonic acid.

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