O-LevelChemistryElectrolysis5070/11 · May/June 2015 · Q141 Mark

Concentrated aqueous sodium chloride is electrolysed using inert electrodes. Which statement about this electrolysis is correct?

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AChloride ions travel through the solution to the negative electrode.

BElectrons travel through the solution to the sodium ions.

CGases are given off at both electrodes.

DSodium is formed at the negative electrode.

✓ Correct answer

C: Gases are given off at both electrodes.

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Topic: Electrolysis, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2015 Paper 1 Variant 1, question 14.

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