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8.2 Carboxylic acids and their derivative — Chemistry STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceChemistry8.2 Carboxylic acids and their derivative1 Mark
MCQ
On prolonged heating of ammonium cyanate or urea, we get
  • A
    ${N_2}$
  • B
    $C{O_2}$
  • ✓
    Biurette
  • D
    Ammonium carbonate
✓

Answer

Correct option: C.
Biurette
c
(c) $\mathop {N{H_4}CNO}\limits_{{\text{Ammonium cyanate}}} \xrightarrow{\Delta }\,\,\,\mathop {N{H_2} - CO - N{H_2}}\limits_{{\text{Urea}}} $

$\mathop {N{H_2} - CO - N{H_2}}\limits_{}  + \mathop {H - NH - CO - N{H_2}}\limits_{{\text{Urea}}} \mathop {\xrightarrow{\Delta }}\limits_{ - N{H_3}} $

$\mathop {N{H_2} - CO - NH - CO - N{H_2}}\limits_{{\text{Biuret}}} $

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