A) \[S{{O}_{3}}\]
B) \[S{{O}_{2}}\]
C) \[{{H}_{2}}O\]
D) none of these
Correct Answer: B
Solution :
Electrophilic in sulphonation is \[S{{O}_{2}}\]. \[S{{O}_{2}}\] acts as electrophilic in the sulphonation of benzene and its derivative.
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