Key Idea (i) Presence of electron withdrawing substituent decreases the basicity while the presence of electron releasing substituent like, −CH3,−C2H5 etc increases the acidity. (ii) HNO2 converts −NH2 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 well as ammonia. R−NH2⟶HNO2R−OH Thus, HNO2 (nitrous acid) converts alkyl amines to alcohols. But C6H5NH2⟶HNO2C6H5 N=NCl benzene diazonium chloride Thus, HNO2 does not convert aryl amines into phenol.
Which of the following statements about primary amines is false ?
NEET UG 2010 — Chemistry Organic Chemistry
2010mcqmedium
Which of the following statements about primary amines is false ?
Official previous-year question
Held on 30 Apr 2010 · Verified 9 Jul 2026.
Options
- A
Alkyl amines are stronger bases than aryl amines
- B
Alkyl amines react with nitrous acid to produce alcohols
- C
Aryl amines react with nitrous acid to produce phenols
- D
Alkyl amines are stronger bases than ammonia
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