DP Chemistry (last assessment 2024)
Question 18N.2.hl.TZ0.10a
| Date | November 2018 | Marks available | [Maximum mark: 2] | Reference code | 18N.2.hl.TZ0.10a |
| Level | hl | Paper | 2 | Time zone | TZ0 |
| Command term | Classify | Question number | a | Adapted from | N/A |
a.
[Maximum mark: 2]
18N.2.hl.TZ0.10a
The following mechanism is proposed for a reaction:
A + B → C + D slow step
D + B → A + E fast step
(a)
Classify substances B and D as reactant, product, catalyst, or intermediate, based on the proposed mechanism.
[2]
Markscheme
B: reactant ✔
D: intermediate ✔