MHT CET Medical202621 April 2026Morning ShiftChemistryAminesActual
Identify the product when ethyl amine reacts with nitrous acid in cold.
Options
- ACH ₃ CH ₂ NO ₂
- BCH ₃ CHO
- CCH ₃ CH ₂ OH
- DCH ₃ CH ₂ NC
Correct answer
C. CH ₃ CH ₂ OH
Step-by-step solution
Ethyl amine ( CH ₃ CH ₂ NH ₂ ) is a primary aliphatic amine. When a primary aliphatic amine reacts with nitrous acid ( HNO ₂ ) in cold conditions, it forms an unstable alkyl diazonium salt. This diazonium salt readily decomposes to release nitrogen gas and forms a carbocation, which reacts with water present in the mixture to give ethyl alcohol ( CH ₃ CH ₂ OH ). CH ₃ CH ₂ NH ₂ + HNO ₂ [ CH ₃ CH ₂ N ₂⁺ Cl ⁻] CH ₃ CH ₂ OH + N ₂ + HCl Answer: CH ₃ CH ₂ OH