MCQs – Amines

1. The general formula of primary amines is:
a) R₂NH
b) R₃N
c) R–NH₂
d) Ar–NO₂

2. Aniline is less basic than ethylamine because:
a) –NH₂ group is electron withdrawing in aniline
b) Lone pair of nitrogen in aniline is delocalised into the benzene ring
c) Aniline is aromatic
d) Resonance decreases stability of aniline

3. Which one gives carbylamine test?
a) Primary amine
b) Secondary amine
c) Tertiary amine
d) Amide

4. The IUPAC name of CH₃–NH₂ is:
a) Methyl amine
b) Aminomethane
c) Methanamine
d) Both (a) and (c)

5. The Hinsberg reagent is:
a) Benzenesulphonyl chloride
b) Chlorobenzene
c) Benzoyl chloride
d) Acetyl chloride

6. Which amine gives a nitrosoamine with nitrous acid at low temperature?
a) Primary aliphatic amine
b) Secondary amine
c) Tertiary amine
d) Aromatic amine

7. Which amine reacts with nitrous acid to give nitrogen gas?
a) Primary aliphatic amine
b) Secondary amine
c) Tertiary amine
d) Aromatic amine

8. The product formed when aniline reacts with bromine water is:
a) Monobromoaniline
b) 2,4,6–Tribromoaniline
c) 3–Bromoaniline
d) 4–Bromoaniline

9. Which one is most basic in aqueous solution?
a) Aniline
b) Ethylamine
c) p–Nitroaniline
d) Benzylamine

10. Which of the following is used as a starting material for Hofmann bromamide reaction?
a) Amide
b) Amine
c) Nitro compound
d) Ammonium salt

11. In Gabriel phthalimide synthesis, the product obtained is:
a) Primary amine
b) Secondary amine
c) Tertiary amine
d) Quaternary salt

12. Which of the following will not respond to carbylamine test?
a) CH₃NH₂
b) (CH₃)₂NH
c) C₂H₅NH₂
d) C₆H₅NH₂

13. Acetanilide is obtained by reaction of aniline with:
a) Acetaldehyde
b) Acetic anhydride
c) Acetyl chloride
d) Both (b) and (c)

14. The basic strength of amines in aqueous medium decreases in the order:
a) NH₃ > RNH₂ > R₂NH > R₃N
b) R₂NH > RNH₂ > R₃N > NH₃
c) R₃N > R₂NH > RNH₂ > NH₃
d) NH₃ > R₃N > R₂NH > RNH₂

15. Diazonium salts are stable:
a) At room temperature
b) Only in solid state
c) Below 5 °C
d) In presence of HCl only

16. Reaction of an amine with aryl diazonium salt to form azo compounds is called:
a) Coupling reaction
b) Condensation reaction
c) Neutralisation reaction
d) Elimination reaction

17. The Hinsberg test is used to distinguish:
a) Primary and secondary alcohols
b) Primary, secondary and tertiary amines
c) Aliphatic and aromatic amines
d) Aldehydes and ketones

18. In the Hofmann bromamide reaction, the major product formed from ethanamide is:
a) Ethylamine
b) Methylamine
c) Aniline
d) Ammonia

19. The reaction of nitrous acid with aniline at 0–5 °C gives:
a) p–Nitroaniline
b) Benzenediazonium chloride
c) Anisole
d) Chlorobenzene

20. The reagent used to convert nitrobenzene to aniline is:
a) Zn + HCl
b) Sn + HCl
c) Fe + HCl
d) All of these

✅ Answer Key

  1. c
  2. b
  3. a
  4. d
  5. a
  6. b
  7. a
  8. b
  9. b
  10. a
  11. a
  12. b
  13. d
  14. b
  15. c
  16. a
  17. b
  18. b
  19. b
  20. d

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