DP Chemistry (last assessment 2024)
Question 21M.2.hl.TZ1.e(ii)
| Date | May 2021 | Marks available | [Maximum mark: 1] | Reference code | 21M.2.hl.TZ1.e(ii) |
| Level | hl | Paper | 2 | Time zone | TZ1 |
| Command term | Deduce | Question number | e(ii) | Adapted from | N/A |
e(ii).
[Maximum mark: 1]
21M.2.hl.TZ1.e(ii)
Iron may be extracted from iron (II) sulfide, FeS.
The first step in the extraction of iron from iron (II) sulfide is to roast it in air to form iron (III) oxide and sulfur dioxide.
Deduce the change in the oxidation state of sulfur.
[1]
Markscheme
+6
OR
−2 to +4 ✔
Accept “6/VI”.
Accept “−II, 4//IV”.
Do not accept 2- to 4+.
