Amines: Class 12 Previous Year Questions

Amines questions asked in CBSE board exams

Repeated questions first. Open the free app to see each question as it appeared in the paper, with its marking scheme.

1. Assertion (A) : Aromatic primary amines can be prepared by Gabriel Phthalimide synthesis. 1 Reason (R) : Aryl halides do not undergo nucleophilic substitution with the anion formed by phthalimide.
   Board 20261 markAssertion-ReasonRepeated: 2024,2025,2026
2. Assertion (A) : Aromatic primary amines cannot be prepared by Gabriel Phthalimide synthesis. Reason (R) : Aryl halides do not undergo nucleophilic substitution reaction with the anion formed by phthalimide.
   Board 20251 markAssertion-ReasonRepeated: 2024,2025,2026
3. Assertion (A) : Aliphatic primary amines can be prepared by Gabriel phthalimide synthesis. Reason (R) : Alkyl halides undergo nucleophilic substitution with anion formed by phthalimide.
   Board 20241 markAssertion-ReasonRepeated: 2024,2025,2026
4. The reaction of amines with mineral acids to form ammonium salts shows that these are basic in nature. Aliphatic amines are stronger bases than ammonia whereas aromatic amines are weaker bases than ammonia. Aliphatic and aromatic primary and secondary amines r…
   Board 20264 marksshort answer
5. Aniline on direct nitration yields 1 (A) 51%-ortho, 47%-para, 2%-meta derivatives (B) 51%-meta, 47%-ortho, 2%-para derivatives (C) 51%-para, 47%-meta, 2%-ortho derivatives (D) 51%-ortho, 47%-meta, 2%-para derivatives
   Board 20261 markMCQ
6. Which of the following amines has lowest pKb value ? 1 (A) C6H5 – N(CH3)2 (B) C6H5 – NH(CH3) (C) C6H5 – NH2 (D)
   Board 20261 markMCQ
7. Identify the compound produced by the reduction of Ethanenitrile with Lithium aluminium hydride : 1 (A) Ethylamine (B) Ethanal (C) Propylamine (D) Methylamine
   Board 20261 markMCQ
8. (a) Arrange the following compounds in increasing order of their boiling point : (1 + 2 = 3) (CH,)2NH, CH,CH,NH2, CH,CH,OH. (b) Give plausible explanation for each of the following : (i) Aromatic primary amines cannot be prepared by Gabriel Phthalimide synthes…
   Board 20253 marksshort answer
9. Amines have a lone pair of electrons on nitrogen atom due to which they behave as Lewis base. Greater the value of Kp or smaller the value of pKp, stronger is the base. Amines are more basic than alcohols, ethers, esters, etc. The basic character of aliphatic …
   Board 20254 marksshort answer
10. Assertion (A) : p-nitroaniline is a weaker base than p-toluidine. Reason (R) : The electron withdrawing effect of NO2 group in p-nitroaniline makes it a weaker base.
    Board 20241 markAssertion-Reason
11. Assertion (A) : Aniline is a stronger base than ammonia. Reason (R) : The unshared electron pair on nitrogen atom in aniline becomes less available for protonation due to resonance.
    Board 20241 markAssertion-Reason
12. Assertion (A) : Diazonium salts of aromatic amines are more stable than those of aliphatic amines. Reason (R) : Diazonium salts of aliphatic amines show resonance.
    Board 20241 markAssertion-Reason
13. Assertion (A) : NH2 group is o- and p-directing in electrophilic substitution reactions. Reason (R) : Aniline cannot undergo Friedel-Crafts reaction.
    Board 20231 markAssertion-Reason
14. (a) (I) Give reasons : 3 + 2 (i) Aniline on nitration gives good amount of m-nitroaniline, though – NH2 group is o/p directing in electrophilic substitution reactions. (ii) (CH3)2 NH is more basic than (CH3)3N in an aqueous solution. (iii) Ammonolysis of alkyl…
    Board 20235 markslong answer
15. Amn {ZåZ{b{IV ê$nmÝVaU H¡$go gånÞ H$a|Jo : (H$moB© ) 3 1=3 (H$) µ\$sZm°b go {n{H«$H$ Aåb (I) àmonoZmoZ go 2-_o{WbàmonoZ-2-Am°b (J) µ\$sZm°b go Eo{Zgmob (K) àmonrZ go àmonoZ-1-Am°b 23. (a) Account for the following : 1+1=2 (i) Phenol is a stronger acid than an …
    Board 20233 marksshort answer
16. (a) Illustrate the following reactions giving suitable example in each case : (i) Gabriel phthalimide synthesis. (i) Carbylamine reaction. (i) Hoffmann bromamide degradation reaction. 1×3=3 OR (b) Write the structures of A, B and C in the following reactions :…
    Board 20221 markMCQ
17. Given below are two statements labelled as Assertion (A) and Reason (R). Assertion (A): Dimethyl amine has higher boiling point than trimethyl amine. Reason (R): The molecular mass of trimethyl amine is relatively higher than that of dimethyl amine. Select the…
    CBSE practice 2022-231 markAssertion-Reason
18. Assertion (A): Nitration of aniline gives significant amount of meta derivative. Reason (R): -NH2 is ortho and para directing and highly activating group. Select the most appropriate answer from the options given below: A. Both A and R are true, and R is the c…
    Sample paper 2026-271 markAssertion-Reason
19. The boiling points and Kb values of isomeric amines are given in table 1. Table 1 Which one of the following statement is correct? A. Amine P is more volatile than amine R, but less basic B. Amine R will give white precipitate with Hinsberg reagent, which is s…
    Sample paper 2026-271 markMCQ
20. Convert Propanamide to the following compounds in not more than two steps: (a) N- Ethylpropanamine (b) Ethanol (c) N-Propylethanamide
    CBSE practice 2023-243 marksshort answer

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