DP Chemistry (last assessment 2024)
Question 18M.2.hl.TZ1.k
| Date | May 2018 | Marks available | [Maximum mark: 2] | Reference code | 18M.2.hl.TZ1.k |
| Level | hl | Paper | 2 | Time zone | TZ1 |
| Command term | Identify | Question number | k | Adapted from | N/A |
k.
[Maximum mark: 2]
18M.2.hl.TZ1.k
Urea, (H2N)2CO, is excreted by mammals and can be used as a fertilizer.
The IR spectrum of urea is shown below.
Identify the bonds causing the absorptions at 3450 cm−1 and 1700 cm−1 using section 26 of the data booklet.
[2]
Markscheme
3450 cm–1: N–H
1700 cm–1: C=O
Do not accept “O–H” for 3450 cm–1.
[2 marks]