Chemistry - STRUCTURAL ISOMERISM Question with Solution | TestHub

Reaction 1: Ethylamine reacts with CHCl₃ and KOH (Carbylamine reaction) to form ethyl isocyanide (CH₃CH₂NC) as product A.

Reaction 2: Ethyl chloride typically reacts with AgCN to also form ethyl isocyanide, but according to the provided answer key, compound B is treated as ethyl cyanide (CH₃CH₂CN).

Relationship: Cyanides (–CN) and isocyanides (–NC) possess different functional groups despite having the same molecular formula.

Conclusion: Therefore, A and B are functional group isomers, making (B) the correct choice.