Compound A having molecular formula C₃H₇NO is treated with Br₂ in the presence of aqueous KOH to give compound B . Compound B is further heated with chloroform and alcoholic KOH to produce compound C . The compound C is :

Step-by-step solution

Compound A with molecular formula C₃H₇NO is propanamide ( CH₃CH₂CONH₂ ). When propanamide is treated with Br₂ and aqueous KOH , it undergoes Hoffmann bromamide degradation. This is a step-down reaction where the carbonyl carbon is lost, yielding ethanamine ( CH₃CH₂NH₂ ) as compound B . Heating a primary amine like ethanamine with chloroform ( CHCl₃ ) and alcoholic KOH results in the Carbylamine reaction. This produces an isocyanide with a highly unpleasant odour. Thus, ethanamine is converted to ethyl isocyanide (