O-LevelChemistryElectrolysis5070/11 · Oct/Nov 2025 · Q131 Mark

Which row is correct?

Ato recycle waste hydrogen

Bto recycle waste water

Cto produce electrical energy hydrogen

Dto produce electrical energy water

✓ Correct answer

D: to produce electrical energy water

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Topic: Electrolysis, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2025 Paper 1 Variant 1, question 13.

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