DP Chemistry (first assessment 2025)
Question 21N.1A.SL.TZ0.23
| Date | November 2021 | Marks available | [Maximum mark: 1] | Reference code | 21N.1A.SL.TZ0.23 |
| Level | SL | Paper | 1A | Time zone | TZ0 |
| Command term | Identify | Question number | 23 | Adapted from | N/A |
23.
[Maximum mark: 1]
21N.1A.SL.TZ0.23
Which statement is correct about the electrolysis of molten lead(II) bromide, PbBr2?
A. Br− ions accept electrons at the cathode (negative electrode).
B. Pb2+ ions accept electrons at the anode (positive electrode).
C. Br− ions lose electrons at the anode (positive electrode).
D. Pb2+ ions lose electrons at the cathode (negative electrode).
[1]
Markscheme
C
Syllabus sections
Reactivity 3. What are the mechanisms of chemical change? » Reactivity 3.2—Electron transfer reactions » Reactivity 3.2.8—An electrolytic cell is an electrochemical cell that converts electrical energy to chemical energy by bringing about non-spontaneous reactions. Explain how current is conducted in an electrolytic cell. Deduce the products of the electrolysis of a molten salt.