MHT CET 2022 Chemistry question

Identify the product obtained when bromoethane is heated with excess of alcoholic ammonia under pressure

(A)Ethanol
(B)Nitro ethane
(C)EthanamineCorrect
(D)Ethene

Answer: (C)

Solution

This is Hofmann's ammonolysis. Ammonia acts as a nucleophile and displaces bromide from bromoethane: C_2H_5Br + NH_3 \to C_2H_5NH_3^+Br^- \xrightarrow{NH_3} C_2H_5NH_2 + NH_4Br. Using a large excess of ammonia (in alcoholic solution, heated in a sealed tube)

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Question ID VK-093978