DP Chemistry (first assessment 2025)

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Question 19N.1A.SL.TZ0.24

Date	November 2019	Marks available	[Maximum mark: 1]	Reference code	19N.1A.SL.TZ0.24
Level	SL	Paper	1A	Time zone	TZ0
Command term	Deduce	Question number	24	Adapted from	N/A

24.

[Maximum mark: 1]

19N.1A.SL.TZ0.24

What is formed at the electrodes during the electrolysis of molten sodium bromide?

[1]

Markscheme

D

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.