Question

Major product A and B respectively are

• A. A = C₂H₅CN, B = C₂H₅NC
• B. A = C₂H₅NC, B = C₂H₅NC
• C. A = C₂H₅CN, B = C₂H₅CN
• D. A = C₂H₅NC, B = C₂H₅CN

Answer 1

Answer: (D)

D

Answer 2

Bromoethane reacts with KCN (ionic) to yield ethyl cyanide (nitrile) as the major product because the carbon atom of the cyanide ion is the more nucleophilic site. Bromoethane reacts with AgCN (covalent) to yield ethyl isocyanide as the major product because the nitrogen atom's lone pair is available for attack, forming an N-C bond. Thus, A = C₂H₅NC and B = C₂H₅CN.