NEET2026ChemistryChapterActual
An organic compound X ( C ₆ H ₇ N ) on treatment with NaNO ₂ and dilute HCl at 273-278 K forms an intermediate Y . The intermediate Y is unstable in the dry state but can be maintained in a cold aqueous solution. When Y is reacted with ethanol, it yields a hydrocarbon Z , along with the evolution of nitrogen gas and the formation of ethanal. Which of the following statements is correct regarding this reaction sequenc
Options
- ACompound X is a primary aliphatic amine, and Y is an aliphatic diazonium salt.
- BThe formation of Z from Y is a nucleophilic substitution reaction where ethanol acts as a nucleophile.
- CThe conversion of Y to Z is a redox process in which ethanol acts as a reducing agent.
- DIntermediate Y is highly stable at room temperature due to resonance stabilization of the diazonium ion.
Correct answer
C. The conversion of Y to Z is a redox process in which ethanol acts as a reducing agent.
Step-by-step solution
Compound X with the molecular formula C ₆ H ₇ N is aniline ( C ₆ H ₅ NH ₂ ), which is a primary aromatic amine. When aniline is treated with NaNO ₂ and dilute HCl at 273-278 K , it undergoes diazotization to form benzenediazonium chloride ( C ₆ H ₅ N ₂^+ Cl ^- ), which is the intermediate Y . Benzenediazonium chloride reacts with ethanol ( CH ₃ CH ₂ OH ) to yield benzene ( C ₆ H ₆ ), which is the hydrocarbon Z , along with nitrogen gas and ethanal ( CH ₃ CHO ). The chemical equation is: C ₆ H ₅ N ₂^+ Cl ^- + CH ₃ C