O-LevelChemistryElectrolysis5070/12 · May/June 2022 · Q161 Mark

Dilute sulfuric acid is electrolysed. Hydrogen gas and oxygen gas are produced. Which row correctly describes what happens?

Aanode (oxygen produced at the), cathode (hydrogen produced at the), decreases (concentration of acid)

Banode (oxygen produced at the), cathode (hydrogen produced at the), increases (concentration of acid)

Ccathode (oxygen produced at the), anode (hydrogen produced at the), decreases (concentration of acid)

Dcathode (oxygen produced at the), anode (hydrogen produced at the), increases (concentration of acid)

✓ Correct answer

B: anode (oxygen produced at the), cathode (hydrogen produced at the), increases (concentration of acid)

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Topic: Electrolysis, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2022 Paper 1 Variant 2, question 16.

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