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9. Amines — Chemistry STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceChemistry9. Amines1 Mark
MCQ
A nitrogen containing organic compound gave an oily liquid on heating with bromine and potassium hydroxide solution. On shaking the product with acetic anhydride, an antipyretic drug was obtained. The reactions indicate that the starting compound is
  • A
    Aniline
  • ✓
    Benzamide
  • C
    Acetamide
  • D
    Nitrobenzene
✓

Answer

Correct option: B.
Benzamide
b
(b) ${{C}_{6}}{{H}_{5}}CON{{H}_{2}}+B{{r}_{2}}+KOH\to {{C}_{6}}{{H}_{5}}CONHBr+KBr+{{H}_{2}}O$

                                                                                                                 $\downarrow KOH$

${{K}_{2}}C{{O}_{3}}+{{C}_{6}}{{H}_{5}}N{{H}_{2}}\xleftarrow[2\,KOH]{}{{C}_{6}}{{H}_{5}}NCO+KBr+{{H}_{2}}O$

${{C}_{6}}{{H}_{5}}N{{H}_{2}}+{{(C{{H}_{3}}CO)}_{2}}O\to C{{H}_{3}}CONH{{C}_{6}}{{H}_{5}}+C{{H}_{3}}COOH$

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