DP Chemistry (first assessment 2025)
Question 22M.1A.SL.TZ2.4
| Date | May 2022 | Marks available | [Maximum mark: 1] | Reference code | 22M.1A.SL.TZ2.4 |
| Level | SL | Paper | 1A | Time zone | TZ2 |
| Command term | State | Question number | 4 | Adapted from | N/A |
4.
[Maximum mark: 1]
22M.1A.SL.TZ2.4
Which equation represents the deposition of iodine?
A. I2 (g) → I2 (l)
B. I2 (g) → I2 (s)
C. I2 (l) → I2 (g)
D. I2 (s) → I2 (g)
[1]
Markscheme
B
Examiners report
58% of the candidates identified the equation that represented the deposition of iodine. The most commonly chosen distractor was the condensation of gaseous iodine. Sublimation was also quite commonly chosen.
Syllabus sections
Structure 1. Models of the particulate nature of matter » Structure 1.1—Introduction to the particulate nature of matter » Structure 1.1.2—Kinetic molecular theory. The kinetic molecular theory is a model to explain physical properties of matter (solids, liquids and gases) and changes of state. Distinguish the different states of matter. Use state symbols (s, , g and aq) in chemical equations.