Question

When ammonium cyanate is heated for a long time, the product is:

• A. Nitrous oxide
• B. Biuret
• C. Nitrogen and water
• D. Ammonium cyanide

Answer 1

The correct option is B

Biuret

Explanation for the correct option:

(B) Biuret

• The heating of Ammonium cyanate results in the formation of urea.
• Further heating of urea for a long time produces biuret.

The chemical reaction when urea is heated at $180°\mathrm{C}$ is depicted below:

Explanation for the incorrect options:

When ammonium cyanate is heated for a long time, the product is biuret. Thus options A, C, and D are incorrect.

Hence, option (B) is correct.