DP Chemistry (first assessment 2025)

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Question 22M.1A.SL.TZ1.22

Date	May 2022	Marks available	[Maximum mark: 1]	Reference code	22M.1A.SL.TZ1.22
Level	SL	Paper	1A	Time zone	TZ1
Command term	State	Question number	22	Adapted from	N/A

22.

[Maximum mark: 1]

22M.1A.SL.TZ1.22

Which statement is correct for both voltaic and electrolytic cells?

A. The oxidation reaction releases electrons.

B. The oxidation reaction occurs at the positive electrode.

C. The cathode is negative.

D. Electrons flow through the electrolyte.

[1]

Markscheme

A

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.