DP Chemistry (last assessment 2024)
Question 19M.2.sl.TZ1.1a
| Date | May 2019 | Marks available | [Maximum mark: 2] | Reference code | 19M.2.sl.TZ1.1a |
| Level | sl | Paper | 2 | Time zone | TZ1 |
| Command term | State | Question number | a | Adapted from | N/A |
a.
[Maximum mark: 2]
19M.2.sl.TZ1.1a
Xylene is a derivative of benzene. One isomer is 1,4-dimethylbenzene.
(a)
State the number of 1H NMR signals for this isomer of xylene and the ratio in which they appear.
Number of signals:
Ratio:
[2]
Markscheme
Number of signals:
2 [✔]
Ratio:
3 : 2
OR
6 : 4 [✔]
Note: Accept any correct integer or fractional ratio.
Accept ratios in reverse order.
Examiners report
Most students gained M1 but very few gained M2, suggesting that the correct answer of 2 signals may have been a guess.
