DP Chemistry (last assessment 2024)
Question 19M.2.sl.TZ2.3c
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.2.sl.TZ2.3c |
| Level | sl | Paper | 2 | Time zone | TZ2 |
| Command term | Suggest | Question number | c | Adapted from | N/A |
c.
[Maximum mark: 1]
19M.2.sl.TZ2.3c
Dinitrogen monoxide, N2O, causes depletion of ozone in the stratosphere.
(c)
Suggest why it is surprising that dinitrogen monoxide dissolves in water to give a neutral solution.
[1]
Markscheme
oxides of nitrogen/non-metals are «usually» acidic [✔]
Examiners report
Only a quarter of the candidates answered correctly. Some simply stated that N2O forms HNO3 with water which did not gain the mark.
