Classify the following amines as primary, secondary or tertiary: (i) (ii) (I) (C₂H₅)₂CHNH₂ (II) (C2H5)2NH

(I) Write structures of different isomeric amines corresponding to the molecularformula, C₄H₁₁N (II) Write IUPAC names of all theisomers. (III) What type of isomerism is exhibited by different pairs ofamines?

How will you convert? (I) Benzene intoaniline (II) Benzene into N,N-dimethylaniline (III) Cl-(CH2)4-Cl into hexan-1, 6-diamine?

Arrange the following in increasing order of their basic strength: (I) C₂H₅NH₂, C₆H₅NH₂, NH₃, C₆H₅CH₂NH₂ and(C₂H₅)₂NH (II) C₂H₅NH₂, (C₂H₅)₂NH, (C₂H₅)₃N, C₆H₅NH₂ (III) CH₃NH₂, (CH₃)₂NH, (CH₃)₃N, C₆H₅NH₂,C₆H₅CH₂NH₂.

Complete the following acid-base reactions and name the products: (I) CH₃CH₂CH₂NH₂ +HCl (II) (C₂H₅)₃N +HCl

Write reactions of the final alkylation product of aniline with excess of methyl iodide in the presence of sodium carbonate solution.

Write chemical reaction of aniline with benzoyl chloride and write the name of the product obtained.

Write structures of different isomers corresponding to the molecular formula, C₃H₉N. Write IUPAC names of the isomers which will liberate nitrogen gas on treatment with nitrous acid.

Convert (I) 3-Methylaniline into3-nitrotoluene. (II) Aniline into1,3,5-tribromobenzene.

Write IUPAC names of the following compounds and classify them into primary, secondary and tertiary amines. (i) (CH₃)₂ CHNH₂(ii) CH₃(CH₂)₂NH₂ (iii) CH₃NHCH(CH₃)₂(iv) (CH₃)₃CNH₂ (v) C₆H₅NHCH₃(vi) (CH₃CH₂)₂NCH₃ (vii) m-BrC₆H₄NH₂

Give one chemical test to distinguish between the following pairs of compounds. (I) Methylamine anddimethylamine (II) Secondary and tertiaryamines (III) Ethylamine andaniline (IV) Aniline andbenzylamine (V) Aniline andN-methylaniline.

Account for the following: (I) pK_bof aniline is more than that ofmethylamine. (II) Ethylamine is soluble in water whereas aniline isnot. (III) Methylamine in water reacts with ferric chloride to precipitate hydrated ferricoxide. (IV) Although amino group is o, p- directing in aromatic electrophilic substitution reactions, aniline on nitration gives a substantial amount ofm-nitroaniline. (V) Aniline does not undergo Friedel-Craftsreaction. (VI) Diazonium salts of aromatic amines are more stable than those of aliphaticamines. (VII) Gabriel phthalimide synthesis is preferred for synthesising primaryamines.

Arrange the following: (I) In decreasing order of thepK_bvalues: C₂H₅NH₂, C₆H₅NHCH₃, (C₂H₅)₂NH andC₆H₅NH₂ (II) In increasing order of basicstrength: C₆H₅NH₂, C₆H₅N(CH₃)₂, (C₂H₅)₂NH and CH₃NH₂ (III) In increasing order of basicstrength: (IV) Aniline, p-nitroaniline andp-toluidine (V) C₆H₅NH₂, C₆H₅NHCH₃,C₆H₅CH₂NH₂. (VI) In decreasing order of basic strength in gasphase: C₂H₅NH₂, (C₂H₅)₂NH, (C₂H₅)₃N and NH₃ (VII) In increasing order of boilingpoint: C₂H₅OH, (CH₃)₂NH, C₂H₅NH₂ (VIII) In increasing order of solubility inwater: C₆H₅NH₂, (C₂H₅)₂NH, C₂H₅NH₂.

How will you convert: (I) Ethanoic acid intomethanamine (II) Hexanenitrile into1-aminopentane (III) Methanol to ethanoicacid (IV) Ethanamine intomethanamine (V) Ethanoic acid into propanoicacid (VI) Methanamine intoethanamine (VII) Nitromethane intodimethylamine (VIII) Propanoic acid into ethanoic acid

Describe a method for the identification of primary, secondary and tertiary amines. Also write chemical equations of the reactions involved.

Write short notes on the following: (i) Carbylamine reaction (ii) Diazotisation (iii) Hofmann’s bromamide reaction (iv) Coupling reaction (v) Ammonolysis (vi) Acetylation (vii) Gabriel phthalimide synthesis.

Accomplish the following conversions: (I) Nitrobenzene to benzoicacid (II) Benzene tom-bromophenol (III) Benzoic acid toaniline (IV) Aniline to2,4,6-tribromofluorobenzene (V) Benzyl chloride to2-phenylethanamine (VI) Chlorobenzene top-chloroaniline (VII) Aniline top-bromoaniline (VIII) Benzamide totoluene (IX) Aniline to benzylalcohol.

Give the structures of A, B and C in the following reactions: (i) (ii) (iii) (iv) (v) (vi)

An aromatic compound ‘A’ on treatment with aqueous ammonia and heating forms compound ‘B’ which on heating with Br₂ and KOH forms a compound ‘C’ of molecular formula C₆H₇N. Write the structures and IUPAC names of compounds A, B and C.

Complete the following reactions: (i) (ii) (iii) (iv) (v) (vi) (vii)

Why cannot aromatic primary amines be prepared by Gabriel phthalimide synthesis?

Write the reactions of (i) aromatic and (ii) aliphatic primary amines with nitrous acid.

Give plausible explanation for each of the following: (I) Why are amines less acidic than alcohols of comparable molecularmasses? (II) Why do primary amines have higher boiling point than tertiaryamines? (III) Why are aliphatic amines stronger bases than aromaticamines?