CRASH COURSE MHT-CET CHEMISTRY

26. compounds containing nitrogen

1. Which of the following amines cannot be prepared by Gabriel phthalimide synthesis?

(a) sec - propylamine

(b) tert - butylamine

(c) 2 - Phenylethylamine

(d) N - Methylbenzylamine

2. Which of the following compounds has highest boiling point?

(a) Ethane

(b) Ethanoic acid

(c) Ethanol

(d) Ethanamine

3. Identify the statement about the basic nature of amines.

(a) Alkylamines are weaker bases than ammonia.

(b) Arylamines are stronger bases than alkylamines.

(c) Secondary aliphatic amines are stronger bases than primary aliphatic amines

(d) Tertiary aliphatic amines are weaker bases than arylamines.

4. The compounds \(\mathrm{A}, \mathrm{B}\) and \(\mathrm{C}\) react with methyl iodide to give finally quaternary ammonium iodides. Only C gives carbylamines test while only \(A\) form yellow oily compound on reaction with nitrous acid. The compounds \(A, B\) and \(C\) are respectively.

(a) Butan - 1 - amine, \(\mathrm{N}\) - Ethylethanarnine and \(\mathrm{N}, \mathrm{N}\) - Dimethylethanamine.

(b) N-Ethylethanamine, N, N - Dimethylethanamine and Butan - 1 - amine.

(c) N, N-Dimethylethanamine, \(\mathrm{N}\) - Ethylethanamine and Butan - 1 - amine.

(d) N- Ethylethanamine, Butan - 1 - amine and N- Ethylethanamine.

5. Which of the following amines is most basic in nature?

(a) 2,4-Dichloroaniline

(b) 2, 4 - Dimethylaniline

(c) 2,4-Dinitroaniline

(d) 2, 4-Dibromoaniline

6. How many moles of methyl iodide are required to convert ethylamine, diethylamine and triethylamine into quaternary ammonium salt, respectively?

(a) 1,2 and 3

(b) 2,3 and 1

(c) 3,2 and 1

(d) 3,1 and 2

7. Which of the following amines does not undergoes acetylation?

(a) \(\mathrm{t}\) - butylamine

(b) ethylamine

(c) diethylamine

(d) triethylamine

8. Acetoxime on catalytic reduction gives

(a) Acetic acid

(b) acetic anhydride

(c) ethyl amine

(d) isopropylamine

9. n-Propylamine can be prepared by catalytic reduction of

(a) n-propyl cyanide

(b) propionaldoxime

(c) acetoxime

(d) nitroethane

10. Identify the compound ' \(B\) ' in the following series of reactions.


11. Secondary nitro alkanes react with nitrous acid to form

(a) red solution

(b) blue solution

(c) green solution

(d) yellow solution

12. Chloropicrin is used as

(a) antiseptic

(b) antibiotic

(c) insecticide

(d) anaesthetic.

13. Which one of the following compounds will show nitro-acinitro tautomerism?


14. Nef carbonyl synthesis is given by


15. Which one of the following nitroalkanes will give nitrolic acid with \(\mathrm{NaNO}_2 /\) conc. \(\mathrm{H}_2 \mathrm{SO}_4^{\text {? }}\)


16. Arrange given amines in decreasing order of their basicity


(a) I \(>\) II \(>\) III

(b) I \(>\) III \(>\) II

(c) III \(>\) II \(>\) I

(d) II \(>\) I \(>\) III

17. In the given reaction


[X] will be

(a) \(\mathrm{H}_2 / \mathrm{Ni}\)

(b) \(\mathrm{Sn} /\) conc. \(\mathrm{HCl}\)

(c) \(\mathrm{LiAlH}_4\)

(d) All of these

18. In the given reaction


[X] will be

(a) \(\mathrm{Sn} /\) conc. \(\mathrm{HCl}\)

(b) \(\mathrm{Sn} /\) conc. \(\mathrm{HNO}_3\)

(c) \(\mathrm{Sn} /\) conc. \(\mathrm{H}_2 \mathrm{SO}_4\)

(d) \(\mathrm{Sn} / \mathrm{CH}_3 \mathrm{COOH}\)

19. Which one of the following is aliphatic primary amine?

(a) \(\mathrm{CH}_3-\mathrm{NH}-\mathrm{C}_6 \mathrm{H}_5\)

(b) \(\mathrm{C}_6 \mathrm{H}_5-\mathrm{NH}_2\)

(c) \(\mathrm{C}_6 \mathrm{H}_5-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{NH}_2\)

(d) \(\mathrm{C}_6 \mathrm{H}_5-\mathrm{NH}-\mathrm{C}_6 \mathrm{H}_5\)

20. Ammonolysis of alcohol will NOT give

(a) Primary amine

(b) Secondary amine

(c) quaternary ammonium hydroxide

(d) Tertiary amine

21. In the Hoffmann-Bromamide rearrangement, intermediate compounds are


22. In the given reaction sequence


23. In Gabriel synthesis; amine is always

(a) Aliphatic primary amine

(b) Aliphatic secondary amine

(c) Aromatic primary amine

(d) Aromatic secondary amine

24. \(\mathrm{Br}_2 / \mathrm{NaOH}\) gives bromination reaction with amines at

(a) Nitrogen having hydrogen

(b) \(\alpha\)-carbon having hydrogen

(c) Nitrogen having no \(\alpha\)-hydrogen

(d) \(\alpha\)-carbon having no \(\alpha\)-hydrogen

25. Nitrosoamine test is given by

(a) Primary amines

(b) Primary amines

(c) Aliphatic as well as aromatic secondary amines

(d) Quaternary ammonium halides

26. Which one of the following will NOT give carbylamine reaction?


27. Which of the following orders amongst amines in the gaseous state is true regarding the basic nature of \(\mathrm{NH}_2\) group?

(a) \(\mathrm{CH}_3 \mathrm{NH}_2>\left(\mathrm{CH}_3\right)_2 \mathrm{NH}>\left(\mathrm{CH}_3\right)_3 \mathrm{~N}\)

(b) \(\mathrm{CH}_3 \mathrm{NH}_2>\left(\mathrm{CH}_3\right)_2 \mathrm{NH}<\left(\mathrm{CH}_3\right)_3 \mathrm{~N}\)

(c) \(\mathrm{CH}_3 \mathrm{NH}_2<\left(\mathrm{CH}_3\right)_2 \mathrm{NH}>\left(\mathrm{CH}_3\right)_3 \mathrm{~N}\)

(d) \(\mathrm{CH}_3 \mathrm{NH}_2<\left(\mathrm{CH}_3\right)_2 \mathrm{NH}<\left(\mathrm{CH}_3\right)_3 \mathrm{~N}\)

28. Amongst the following, the most basic compund is

(a) benzylamine

(b) aniline

(c) acetanilide

(d) p-nitroaniline

29. Which of the following orders is correct regarding the basic strength of substituted aniline?

(a) p-nitroaniline \(>\) p-aminobenzaldehyde \(>\) p-bromoaniline

(b) p-nitroaniline \(<\) p-bromoaniline \(<\) p-aminobenzaldehyde

(c) p-nitroaniline \(<\) p-aminobenzaldehyde \(<\) p-bromoaniline

(d) p-nitroaniline \(>\) p-aminobenzaldehyde \(<\) p-bromoaniline

30. The number of resonating structures of aniline is

(a) 2

(b) 3

(c) 4

(d) 5

31. Tertiary amine contains


32. Which of the following is Sandmeyer reaction?

(a) \(2 \mathrm{C}_6 \mathrm{H}_5 \mathrm{Cl} \stackrel{\mathrm{Cl}_2 \mathrm{Cl}_2 / \mathrm{HCl}}{\longrightarrow} \mathrm{C}_6 \mathrm{H}_5+\mathrm{Cl}_2\)

(b) \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{~N}_2 \mathrm{Cl} \stackrel{\mathrm{Cu}_2 \mathrm{O}_2 / \mathrm{HCl}}{\longrightarrow} \mathrm{C}_6 \mathrm{H}_5 \mathrm{Cl}_2+\mathrm{N}_2\)

(c) \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{OH} \stackrel{\text { Zn dust }}{\longrightarrow} \mathrm{C}_6 \mathrm{H}_5+\mathrm{ZnO}\)

(d) \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{NO}_2+6[\mathrm{H}] \stackrel{\mathrm{Sa} / \mathrm{HCl}}{\longrightarrow} \mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2+2 \mathrm{H}_2 \mathrm{O}\)

33. The compound which on reaction with aqueous nitrous acid at low temperature produces an oily nitrosoamine is

(a) methylamine

(b) ethylamine

(c) diethylamine

(d) triethylamine

34. On adding KI to benzenediazonium chloride, the product obtained is

(a) benzene

(b) 1-4-diiodobenzene

(c) iodobenzene

(d) 1,3,5-triiodobenzene

35. Which of the following reagents can convert benzenediazonium chloride into benzene?

(a) Water

(b) Acid

(c) Hypophosphorous acid

(d) \(\mathrm{HCl}\)

36. Which of the following undergoes diazotization?

(a) \(\mathrm{CH}_3 \mathrm{NH}_2\)

(b) \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2\)

(c) \(\mathrm{CH}_3 \mathrm{CONH}_2\)

(d) \(\mathrm{CH}_3 \mathrm{~N}\left(\mathrm{CH}_3\right)_2\)

37. Hinsbert's reagent is

(a) phenylisocyanide

(b) benzenesulphonyl chloride

(c) p-toluenesulphonic acid

(d) o-dichlorobenzene

38. Which of the following can distinguish the three amines, viz., primary, secondary and tertiary?

(a) Azo-dye test

(b) Hinsberg reagent

(c) Carbylamine test

(d) Acetyl chloride

39. Hofmann's method to separate amines in a mixture uses the reagent

(a) benzenesulphonyl chloride

(b) diethyl oxalate

(c) benzeneisocyanide

(d) p-toluenesulphonic acid

40. IUPAC name of the compound


(a) Methylpropamine

(b) 2-Methylbutan-1-amine

(c) 2-Methylpropan-1-amine

(d) 2-Methylethan-1-amine

41. Isomerism shown by amines is

(a) chain

(b) position

(c) functional

(d) all of these

42. The reduction of which of the following compounds would yield secondary amine?

(a) alkyl nitrile

(b) carbylamine

(c) primary amine

(d) sec nitro compound

43. The conversion of alky cyanides into primary amines by sodium and alcohol is called

(a) Ammonolysis

(b) Sabatier-Sanderson's reduction

(c) Mendius reduction

(d) Clemmensen's reduction

44. Acetylation in amines is replacement of ' \(H\) ' of \(\mathrm{NH}_2\) or \(-\mathrm{NH}\) by

(a) \(-\mathrm{CH}_2 \mathrm{COCl}\) group

(b) \(-\mathrm{CH}_2 \mathrm{CO}\) group

(c) \(-\mathrm{COCH}_3\) group

(d) \(-\mathrm{COOCH}_3\) group

45. Carbylamine test is performed in alcoholic \(\mathrm{KOH}\) by heating a mixture of

(a) chloforom and silver powder

(b) trihalogenated methane and primary amine

(c) an alkyl halide and primary amine

(d) an alkyl cyanide and primary amine

46. Valency of \(\mathrm{N}\)-atom in amines is

(a) 5

(b) 2

(c) 3

(d) 4

47. Optically active amines among the following is

(a) methyl amine

(b) dimethyl amine

(c) trimethyl amine

(d) sec-butyl amine

48. Quaternary ammonium salt contains how many co-ordinate bonds?

(a) One

(b) Two

(c) Three

(d) Zero

49. Amines when react with water from

(a) acids

(b) bases

(c) salts

(d) ethers

50. Hybridisation of nitrogen atom in amines is

(a) \(\mathrm{NaOH}\)

(b) \(\mathrm{sp}^3\)

(c) \(\mathrm{H}_2 \mathrm{SO}_4\)

(d) unhybridised