Q21 / 180 · KCET 2009 · Chemistry
The electrophile involved in the sulphonation of benzene is
- A$\mathrm{SO}_{3}^{+}$
- B$\mathrm{SO}_{3}^{2-}$
- C$\mathrm{H}_{3}^{+} \mathrm{O}$
- Correct answerD$\mathrm{SO}_{3}$
Solution
The electrophile involved in the sulphonation of benzene is $\mathrm{SO}_{3}$.
$$
2 \mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow \mathrm{SO}_{3}+\mathrm{H}_{3} \mathrm{O}^{+}+\mathrm{HSO}_{4}^{-}
$$
Hence, the correct answer is option: 'D'.