DP Chemistry (last assessment 2024)
Question 20N.3.hl.TZ0.c(i)
| Date | November 2020 | Marks available | [Maximum mark: 1] | Reference code | 20N.3.hl.TZ0.c(i) |
| Level | hl | Paper | 3 | Time zone | TZ0 |
| Command term | Suggest | Question number | c(i) | Adapted from | N/A |
c(i).
[Maximum mark: 1]
20N.3.hl.TZ0.c(i)
There has been significant growth in the use of carbon nanotubes, CNT.
Alloying metals changes their properties. Suggest one property of magnesium that could be improved by making a magnesium–CNT alloy.
[1]
Markscheme
Any of:
ductility ✔
strength/resistance to deformation ✔
malleability ✔
hardness ✔
resistance to corrosion/chemical resistance ✔
range of working temperatures ✔
density ✔
Do not accept “conductivity”.
Examiners report
This question proved to be difficult and few could suggest a suitable property (such as ductility) of magnesium that could be improved by making a magnesium-CNT alloy.
