DP Chemistry (first assessment 2025)
Question 19M.2.SL.TZ1.13c
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.2.SL.TZ1.13c |
| Level | SL | Paper | 2 | Time zone | TZ1 |
| Command term | Suggest | Question number | c | Adapted from | N/A |
c.
[Maximum mark: 1]
19M.2.SL.TZ1.13c
(c)
Biodiesel containing ethanol can be made from renewable resources.
Suggest one environmental disadvantage of producing biodiesel from renewable resources.
[1]
Markscheme
use of «farm» land «for production»
OR
deforestation «for crop production for fuel»
OR
can release more NOx «than normal fuel on combustion» [✔]
Note: Ignore any reference to cost.
Examiners report
Many students did not take into account “production from renewable resources” and answered in terms of the combustion of biodiesel, though about a third correctly identified the area of land biofuel crops require.
Syllabus sections
Reactivity 1. What drives chemical reactions? » Reactivity 1.3—Energy from fuels » Reactivity 1.3.4—Biofuels are produced from the biological fixation of carbon over a short period of time through photosynthesis. Understand the difference between renewable and non-renewable energy sources. Consider the advantages and disadvantages of biofuels.