DP Chemistry (last assessment 2024)
Question 19M.3.sl.TZ2.4e
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.3.sl.TZ2.4e |
| Level | sl | Paper | 3 | Time zone | TZ2 |
| Command term | Write | Question number | e | Adapted from | N/A |
e.
[Maximum mark: 1]
19M.3.sl.TZ2.4e
Metals are extracted from their ores by several methods, including electrolysis and reduction with carbon.
(e)
Carbon nanotubes are added to metals to increase tensile strength.
Write an equation for the formation of carbon nanotubes from carbon monoxide.
[1]
Markscheme
2CO(g) → C(s) + CO2 (g) [✔]
Examiners report
This was a very poorly answered question. Very few candidates knew the correct balanced equation or gave an equation that was not balanced.
