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  4. Ar-CONH2 xrightarrow[]Br2+KOHAr-NH2 This reaction is

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Q. $ Ar-CON{{H}_{2}}\xrightarrow[{}]{B{{r}_{2}}+KOH}Ar-N{{H}_{2}} $ This reaction is

Rajasthan PETRajasthan PET 2004

Solution:

$ \underset{aromatic\text{ }amide}{\mathop{Ar-CON{{H}_{2}}}}\,+B{{r}_{2}}+4KOH\xrightarrow[{}]{{}}\underset{\begin{smallmatrix} aromatic \\ amine \end{smallmatrix}}{\mathop{Ar-N{{H}_{2}}}}\, $ $ +{{K}_{2}}C{{O}_{3}}+2KBr+2{{H}_{2}}O $ This reaction is called Hofmann bromamide reaction.