DP Chemistry (last assessment 2024)
Question 22M.1.hl.TZ2.19
| Date | May 2022 | Marks available | [Maximum mark: 1] | Reference code | 22M.1.hl.TZ2.19 |
| Level | hl | Paper | 1 | Time zone | TZ2 |
| Command term | Predict | Question number | 19 | Adapted from | N/A |
19.
[Maximum mark: 1]
22M.1.hl.TZ2.19
What is correct about the rate of disappearance of NO?
2NO (g) + 2H2 (g) → N2 (g) + 2H2O (g)
rate = k[H2][NO]2
A. It equals half the rate of disappearance of H2.
B. It equals the rate of disappearance of H2.
C. It equals twice the rate of disappearance of H2.
D. It equals four times the rate of disappearance of H2.
[1]
Markscheme
B
Examiners report
61% of candidates were able to deduce the energy profile of an SN1 reaction correctly.