A) \[{{H}_{2}}SO_{4}^{-}\]
B) \[S{{O}_{2}}\]
C) \[SO_{2}^{+}\]
D) \[S{{O}_{3}}\]
Correct Answer: D
Solution :
\[2{{H}_{2}}S{{O}_{4}}\underset{\begin{smallmatrix} (electrophile \\ of\text{ }aromatic \\ sulphonation) \end{smallmatrix}}{\mathop{S{{O}_{3}}}}\,+HSO_{4}^{-}+{{H}_{3}}{{O}^{+}}\]
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