DP Chemistry (first assessment 2025)
Question 22M.1A.SL.TZ2.23
| Date | May 2022 | Marks available | [Maximum mark: 1] | Reference code | 22M.1A.SL.TZ2.23 |
| Level | SL | Paper | 1A | Time zone | TZ2 |
| Command term | State | Question number | 23 | Adapted from | N/A |
23.
[Maximum mark: 1]
22M.1A.SL.TZ2.23
The arrows represent electron flow in the diagram. What does terminal X on the battery represent?
A. Anode and positive terminal
B. Anode and negative terminal
C. Cathode and positive terminal
D. Cathode and negative terminal
[1]
Markscheme
C
Examiners report
44% of the candidates identified the electrode and its charge based on the direction of the electron flow in the circuit. Some teachers commented that this question is more of a physics than chemistry question.
Syllabus sections
Reactivity 3. What are the mechanisms of chemical change? » Reactivity 3.2—Electron transfer reactions » Reactivity 3.2.5—Oxidation occurs at the anode and reduction occurs at the cathode in electrochemical cells. Identify electrodes as anode and cathode, and identify their signs/polarities in voltaic cells and electrolytic cells, based on the type of reaction occurring at the electrode.