NEET2010ChemistryAlcohols Phenols and EthersActual
Which of the following statements about primary amines is false ?
Options
- AAlkyl amines are stronger bases than aryl amines
- BAlkyl amines react with nitrous acid to produce alcohols
- CAryl amines react with nitrous acid to produce phenols
- DAlkyl amines are stronger bases than ammonia
Correct answer
C. Aryl amines react with nitrous acid to produce phenols
Step-by-step solution
Key Idea (i) Presence of electron withdrawing substituent decreases the basicity while the presence of electron releasing substituent like, - CH ₃,- C ₂ H ₅ etc increases the acidity. (ii) HNO ₂ converts - NH ₂ group of aliphatic amine into - OH while that of aromatic amines into - N = NCl . Since, phenyl group is a electron withdrawing group, it decreases the basicity. Alkyl group, on the other hand, being electron releasing, increases the basicity. Thus, alkyl amines are more basic as compared to aryl amines as w