DP Chemistry (last assessment 2024)
Question 18M.2.sl.TZ1.1g
| Date | May 2018 | Marks available | [Maximum mark: 2] | Reference code | 18M.2.sl.TZ1.1g |
| Level | sl | Paper | 2 | Time zone | TZ1 |
| Command term | Identify | Question number | g | Adapted from | N/A |
g.
[Maximum mark: 2]
18M.2.sl.TZ1.1g
Urea, (H2N)2CO, is excreted by mammals and can be used as a fertilizer.
(g)
The mass spectrum of urea is shown below.
Identify the species responsible for the peaks at m/z = 60 and 44.
[2]
Markscheme
60: CON2H4+
44: CONH2+
Accept “molecular ion”.
[2 marks]