Pyrrole undergoes sulfonation in presence of _______to produce pyrrole – 2 – sulfonic acid. | Faculties

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Ram Sharma

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📊 Pharmaceutical Organic Chemistry 3

Q. Pyrrole undergoes sulfonation in presence of _______to produce pyrrole – 2 – sulfonic acid.

(A) Conc. Sulphuric acid
(B) SO3 and pyridine
(C) Dilute sulphuric acid/pyridine
(D) SO3 and ethanol

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✅ Correct Answer: (B) SO3 and pyridine

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