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Which one of the following gives amine on heating with amide?
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$\mathrm{Br}_{2}$ in aqueous $\mathrm{KOH}$
Hofmann bromamide reaction : this method is used for the preparation of any $1^{\circ}$ amine as well as aniline. During the reaction amide is treated with $\mathrm{Br}_{2}$ and alkali $(\mathrm{KOH})$ to get primary amine. This reaction is used to descend the series in which carbon atom is removed as carbonate ion $\left(\mathrm{CO}_{3}^{2-}\right)$ reaction is given as
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