DP Chemistry (first assessment 2025)

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Question 21M.1A.SL.TZ2.23

Date	May 2021	Marks available	[Maximum mark: 1]	Reference code	21M.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]

21M.1A.SL.TZ2.23

What occurs at an anode?

[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.