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In the Hinsberg test, what does a primary amine form in aqueous alkali?
AInsoluble sulfonamide
BSoluble sulfonamide salt
CInsoluble sulfonic acid
DGaseous isocyanide
Answer & Solution
Correct answer: B. Soluble sulfonamide salt
The primary sulfonamide keeps an acidic N-H, which alkali deprotonates to give a water-soluble salt.
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