NCERT solutions for Class 12 Chemistry Textbook chapter 13 - Amines [Latest edition]

Chapter 13: Amines

[Pages 384 - 399]

NCERT solutions for Class 12 Chemistry Textbook Chapter 13 Amines[Pages 384 - 399]

Q 2 | Page 384

(i) Write structures of different isomeric amines corresponding to the molecular formula, C4H11N

(ii) Write IUPAC names of all the isomers.

(iii) What type of isomerism is exhibited by different pairs of amines?

Q 3.1 | Page 387

How will you convert Benzene into aniline?

Q 3.2 | Page 387

How will you convert Benzene into N, N-dimethylaniline?

Q 3.3 | Page 387

How will you convert Cl−(CH2)4−Cl into hexan-1, 6-diamine?

Q 4.1 | Page 396

Arrange the following in increasing order of their basic strength:

C2H5NH2, C6H5NH2, NH3, C6H5CH2NH2 and (C2H5)2NH

Q 4.2 | Page 396

Arrange the following in increasing order of their basic strength:

C2H5NH2, (C2H5)2NH, (C2H5)3N, C6H5NH2

Q 4.3 | Page 396

Arrange the following in increasing order of their basic strength

CH3NH2, (CH3)2NH, (CH3)3N, C6H5NH2, C6H5CH2NH2.

Q 5.1 | Page 396

Complete the following acid-base reactions and name the products:

CH3CH2CH2NH2 + HCl →

Q 5.2 | Page 396

Complete the following acid-base reactions and name the products:

C2H5)3N + HCl →

Q 6 | Page 396

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

Q 7 | Page 396

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

Q 8 | Page 396

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.

Q 9.1 | Page 399

Convert  3-Methylaniline into 3-nitrotoluene.

Q 9.1 | Page 399

Convert Aniline into 1,3,5-tribromobenzene.

[Pages 384 - 402]

NCERT solutions for Class 12 Chemistry Textbook Chapter 13 Amines[Pages 384 - 402]

Q 1 | Page 384

Classify the following amines as primary, secondary or tertiary:

1)

2)

3) (C2H5)2CHNH2

4)(C2H5)2NH

Q 1.1 | Page 400

Write IUPAC name of the following compound and classify them into primary, secondary and tertiary amines.

(CH3)CHNH

Q 1.2 | Page 400

Write IUPAC names of the following compounds and classify them into primary, secondary and tertiary amines.

CH3(CH2)2NH2

Q 1.3 | Page 400

Write IUPAC names of the following compounds and classify them into primary, secondary and tertiary amines

CH3NHCH(CH3)2

Q 1.4 | Page 400

Write IUPAC names of the following compounds and classify them into primary, secondary and tertiary amines

(CH3)3CNH2

Q 1.5 | Page 400

Write IUPAC names of the following compounds and classify them into primary, secondary and tertiary amines.

C6H5NHCH3

Q 1.6 | Page 400

Write IUPAC names of the following compounds and classify them into primary, secondary and tertiary amines.

(CH3CH2)2NCH3

Q 1.7 | Page 400

Write IUPAC names of the following compounds and classify them into primary, secondary and tertiary amines

m−BrC6H4NH2

Q 2.1 | Page 400

Give one chemical test to distinguish between the following pairs of compounds.

Methylamine and dimethylamine

Q 2.2 | Page 400

Give one chemical test to distinguish between the following pairs of compounds.

Secondary and tertiary amines

Q 2.3 | Page 400

Give one chemical test to distinguish between the following pairs of compounds.

Ethylamine and aniline

Q 2.4 | Page 400

Give one chemical test to distinguish between the following pairs of compounds.

Aniline and benzylamine

Q 2.5 | Page 400

Give one chemical test to distinguish between the following pair of compounds.

Aniline and N-methylaniline.

Q 3.1 | Page 400

Account for the following

pKof aniline is more than that of methylamine.

Q 3.2 | Page 400

Account for the following:

Ethylamine is soluble in water whereas aniline is not.

Q 3.3 | Page 400

Account for the following:

Methylamine in water reacts with ferric chloride to precipitate hydrated ferric oxide.

Q 3.5 | Page 400

Give reasons for the following:

Aniline does not undergo Friedal- Crafts reaction.

Q 3.5 | Page 400

Account for the following:

Although amino group is op− directing in aromatic electrophilic substitution reactions, aniline on nitration gives a substantial amount of m-nitroaniline.

Q 3.6 | Page 400

Account for the following:

Diazonium salts of aromatic amines are more stable than those of aliphatic amines.

Q 3.7 | Page 400

Account for the following:

Gabriel phthalimide synthesis is preferred for synthesising primary amines.

Q 4.1 | Page 400

Arrange the following:

In decreasing order of the pKbvalues: C2H5NH2, C6H5NHCH3, (C2H5)2NH and C6H5NH2

Q 4.2 | Page 400

Arrange the following:

In increasing order of basic strength: C6H5NH2, C6H5N(CH3)2, (C2H5)2NH and CH3NH2

Q 4.3 | Page 400

Arrange the following:

In increasing order of basic strength: Aniline, p-nitroaniline and p-toluidine

Q 4.3 | Page 401

Arrange the following:

In increasing order of basic strength: C6H5NH2, C6H5NHCH3, C6H5CH2NH2.

Q 4.4 | Page 401

Arrange the following:

In decreasing order of basic strength in gas phase: C2H5NH2, (C2H5)2NH, (C2H5)3N and NH3

Q 4.5 | Page 401

Arrange the following:

In increasing order of boiling point: C2H5OH, (CH3)2NH, C2H5NH2

Q 4.6 | Page 401

Arrange the following:

In increasing order of solubility in water: C6H5NH2, (C2H5)2NH, C2H5NH2.

Q 5.1 | Page 401

How will you convert Ethanoic acid into methanamine

Q 5.2 | Page 401

How will you convert Hexanenitrile into 1-aminopentane

Q 5.3 | Page 401

How will you convert Methanol to ethanoic acid

Q 5.4 | Page 401

How will you convert Ethanamine into methanamine

Q 5.5 | Page 401

How will you convert Ethanoic acid into propanoic acid

Q 5.6 | Page 401

How will you convert Methanamine into ethanamine

Q 5.7 | Page 401

How will you convert Nitromethane into dimethylamine

Q 5.9 | Page 401

How will you convert Propanoic acid into ethanoic acid

Q 6 | Page 401

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

Q 7.2 | Page 401

Write short notes on the following Carbylamine reaction

Q 7.3 | Page 401

Write short notes on Diazotisation

Q 7.4 | Page 401

Write short notes on the following Hofmann’s bromamide reaction

Q 7.5 | Page 401

Write short notes on the following Coupling reaction

Q 7.6 | Page 401

Write short notes on Ammonolysis

Q 7.7 | Page 401

Write short notes on Acetylation

Q 8.1 | Page 401

Accomplish the following conversions Nitrobenzene to benzoic acid

Q 8.2 | Page 401

Accomplish the following conversions - Benzene to m-bromophenol

Q 8.3 | Page 401

Accomplish the following conversions - Benzoic acid to aniline

Q 8.4 | Page 401

Accomplish the following conversions - Aniline to 2,4,6-tribromofluorobenzene

Q 8.5 | Page 401

Accomplish the following conversions - Chlorobenzene to p-chloroaniline

Q 8.6 | Page 401

Accomplish the following conversions: Benzyl chloride to 2-phenylethanamine

Q 8.7 | Page 401

Accomplish the following conversions - Aniline to p-bromoaniline

Q 8.8 | Page 401

Accomplish the following conversions: Benzamide to toluene

Q 8.8 | Page 401

Accomplish the following conversions - Aniline to benzyl alcohol.

Q 9.1 | Page 401

Give the structures of A, B and C in the following reactions

Q 9.2 | Page 401

Give the structures of A, B and C in the following reactions

Q 9.3 | Page 401

Give the structures of A, B and C in the following reactions:

Q 9.4 | Page 401

Give the structures of A, B and C in the following reactions:

Q 9.5 | Page 401

Give the structures of A, B and C in the following reactions:

Q 9.6 | Page 401

Give the structures of A, B and C in the following reactions

Q 10 | Page 402

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.

Q 11 | Page 402

Complete the following reactions :-

C_6H_5NH_2+CHCl_3 + alc.KOH ->

Q 11 | Page 402

Complete the following reactions:

C_6H_5N_2Cl+H_3PO_2+H_2O->

Q 11 | Page 402

Complete the following reactions:

C_6H_5NH_2 +H_2SO_4(conc.) ->

Q 11 | Page 402

Complete the following reactions:

C_6H_5N_2Cl +C_2H_5OH->

Q 11 | Page 402

Complete the following reactions:

C_6H_5NH_2 + Br_2(aq) ->

Q 11 | Page 402

Complete the following reactions:

C_6H_5NH_2 + (CH_3CO)_2O->

Q 11 | Page 402

Complete the following reactions:

Q 12 | Page 402

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

Q 13.1 | Page 402

Write the reactions of aromatic with nitrous acid.

Q 13.2 | Page 402

Write the reactions of aliphatic primary amines with nitrous acid.

Q 14.1 | Page 402

Give plausible explanation for each of the following :

Why are amines less acidic than alcohols of comparable molecular masses?

Q 14.2 | Page 402

Give plausible explanation for each of the following:

Why do primary amines have higher boiling point than tertiary amines?

Q 14.3 | Page 402

Give plausible explanation for each of the following:

Why are aliphatic amines stronger bases than aromatic amines?

NCERT solutions for Class 12 Chemistry Textbook chapter 13 - Amines

NCERT solutions for Class 12 Chemistry Textbook chapter 13 (Amines) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CBSE Class 12 Chemistry Textbook solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. NCERT textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 12 Chemistry Textbook chapter 13 Amines are Introduction of Amines, Classification of Amines, Structure of Amines, Physical Properties of Amines, Nomenclature, Uses, Identification of Primary, Secondary and Tertiary Amines, Cyanides and Isocyanides, Introduction of Diazonium Salts, Method of Preparation of Diazonium Salts, Importance of Diazonium Salts in Synthesis of Aromatic Compounds, Preparation of Amines, Chemical Reactions of Amines - Basic Character of Amines, Chemical Reactions of Amines - Alkylation and Acylation, Chemical Reactions of Amines - Carbylamine Reaction, Chemical Reactions of Amines - Reaction with Nitrous Acid, Chemical Reactions of Amines - Reaction with Arylsulphonyl Chloride, Chemical Reactions of Amines - Electrophilic Substitution, Physical Properties of Diazonium Salts, Chemical Reaction of Diazonium Salts - Reactions Involving Displacement of Nitrogen, Chemical Reaction of Diazonium Salts - Reactions Involving Retention of Diazo Group Coupling Reactions, Organic Compounds Containing Nitrogen Numericals.

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