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Question

Among the following, the compound that can be most readily sulfonated is

A
benzene
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B
nitrobenzene
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C
toluene
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D
chlorobenzene
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Solution

The correct option is C toluene
Toluene is most readily sulfonated among these because methyl group is electron donating (+ I effect), activates benzene ring for electrophilic aromatic substitution. Because in nitrobezene and chlorobenzene, -I groups are present which deactive the ring by making the ring disfavourable for electrophilic substitution reaction. Hence, the correct answer will be option (c).

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