題組內容

Part 2. Short Answer [80 marks]

Using Mandarin to answer the short questions is allowed except question 32 and 33.

21. Urea, (H₂N)₂CO, is excreted by mammals and can be used as a fertilizer.

21f. The IR spectrum of urea is shown below. Identify the bonds causing the absorptions at 3450 cm^–1 and 1700 cm^–1 using the data in the appendix. [2 marks]