Chemistry Class 12 NCERT Solutions: Chapter 13 Amines Part 1

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Q: 1. Classify the following amines as primary, secondary or tertiary:

(i)

Q 1 i Amines of Primary, Secondary or Tertiary

Q 1 I Amines of Primary, Secondary or Tertiary

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(ii)

Q 1 ii Amines of Primary, Secondary or Tertiary

Q 1 II Amines of Primary, Secondary or Tertiary

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(iii)

(iv)

Answer:

Primary: (i) and (iii)

Secondary: (iv)

Tertiary: (ii)

Q: 2. (i) Write structures of different isomeric amines corresponding to the molecular formula,

(ii) Write IUPAC names of all the isomers.

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

Answer:

(i), (ii) The structures and their IUPAC names of different isomeric amines corresponding to the molecular formula, are given below:

(A)

Butanamine

(B)

(C)

(D)

(E)

(F)

(G)

N-Methylpropan-2-amine (2°)

(H)

N, N-Dimethyethnamine (3°)

(iii) The pairs (a) and (b) and (e) and (g) exhibit position isomerism.

The pairs (a) and (c); (a) and (d); (b) and (c); (b) and (d) exhibit chain isomerism.

The pairs (e) and (f) and (f) and (g) exhibit Metamerism.

All primary amines exhibit functional isomerism with secondary and tertiary amines and vice/versa.

Q: 3. How will you convert?

(i) Benzene into aniline

(ii) Benzene into N, N-dimethylaniline

(iii) into hexan-1, 6-diamine?

Answer:

(i)

Q 3 i Benzene into Aniline

Q 3 I Benzene into Aniline

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(ii)

Q 3 ii Benzene into N, N-dimethylaniline

Q 3 II Benzene into N, N-Dimethylaniline

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(iii)

Q 3 iii Cl-(CH 2 ) 4-Cl into hexan-1, 6-diamine

Q 3 III Cl-(CH 2 ) 4-Cl into Hexan-1, 6-Diamine

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