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NCERT Class XII Chemistry
Chapter - Amines
Questions with Solutions

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Question : 10
Total: 22
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.
Solution:  
Given scheme of reactions is
A
Aromatic‌compd.
aq.NH3∕Δ
––––––––▶
B
Br2∕KOH
––––––––▶
C
C6H7N
(i) Looking at the given scheme, we can clearly see that reaction B → C is Hofmann bromamide reaction.
Thus, C is an amine (1°) while B must be an amide with molecular formula C7H7NO.
(ii) Further, the ratio of C and H in B and C are indicativeof the fact that it is an aromatic compound.
Since, B is formed by the action of ammonia on A, A must be a carboxylic acid,
The reactions are
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