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O-LevelChemistryElectrolysis5070/12 · May/June 2022 · Q231 Mark

What is an observation of an oxidation process?

Ablue copper sulfate crystals turning to white powder when heated
Bcopper being deposited on the cathode during electrolysis
Cgreen gas being produced at the anode when sodium chloride is electrolysed
Dwhite precipitate forming when aqueous silver ions react with aqueous chloride ions

✓ Correct answer

C: green gas being produced at the anode when sodium chloride is electrolysed

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About this question

Topic
Electrolysis, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source
O-Level Chemistry, May/June 2022 Paper 1 Variant 2, question 23.

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