DP Chemistry (last assessment 2024)
Question 20N.3.sl.TZ0.9b
| Date | November 2020 | Marks available | [Maximum mark: 1] | Reference code | 20N.3.sl.TZ0.9b |
| Level | sl | Paper | 3 | Time zone | TZ0 |
| Command term | State | Question number | b | Adapted from | N/A |
b.
[Maximum mark: 1]
20N.3.sl.TZ0.9b
Gasoline (petrol), biodiesel and ethanol are fuels.
[U.S. Department of Energy. https://afdc.energy.gov/]
(b)
State a class of organic compounds found in gasoline.
[1]
Markscheme
alkane
OR
cycloalkane
OR
arene ✔
Accept “alkene”.
Do not accept just “hydrocarbon”, since given in stem.
Do not accept “benzene/aromatic” for “arene”.
Examiners report
Most candidates answered alkanes with a lower number stating hydrocarbons or benzene and therefore lost the mark.
