Class 12 Chemistry Amines Practice Questions (Answers)

Class 12 Chemistry Amines Practice Questions (Answers)

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Class 12 Chemistry Amines Practice Questions

Ans 1. Step 1. A mixture of two aromatic compounds (A) and (B) was separated by dissolving in chloroform followed by extraction with aqueous KOH solution.
Compound + CHCl3 ——KOH (aq) → C6H5NH2 + C6H5OH
A → C6H5NH2 (Aniline)
B → C6H5OH (Phenol)

Step 2. The organic layer containing compound (A), when heated with an alcoholic solution of KOH produced a compound (C) (C7H5N) associated with an unpleasant odour.
C6H5NH2 + CHCl3 ——KOH (aq) → C6H5NC + KCl + H2O
C → Unpleasant odour or Foul-smelling Compound Phenyl isocyanide(C6H5NC)

Step 3.  The alkaline aqueous layer on the other hand, when heated with chloroform and then acidified gives a mixture of two isomeric compounds (D) and (E) of molecular formula C7H6O2.

Ans 2. A → PhSO2NHEt
B → PhSO2NEt
C → PhSO2NEt2
D → PhSO2OH
E → Et2NH2+

Ans 3. (a) CH3NHCH2CH3
(b) CH2 = HCCH2 N (CH3)2
(C) PhCH2N(CH3) CH2CH3

Ans 4.  (a, b, c, d)

Ans 5. (a), (c)

Ans 6. (b), (c), (d)

Ans  7. (i). (b) 2-propanol
Ans (ii). (c)

Ans 8. (i). (d)
(ii). (b) A-R, B-P, C-S, D-Q

Class 12 Chemistry Amines Practice Questions (Answers)

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