O-LevelChemistryElectrolysis5070/11 · Oct/Nov 2014 · Q241 Mark

The diagram shows apparatus that can be used to extract aluminium. What are J, K and L? J | K | L || A negative electrode | aluminium oxide + cryolite | aluminium || B negative electrode | cryolite | aluminium oxide || C positive electrode | aluminium oxide | cryolite || D positive electrode | aluminium oxide + cryolite | aluminium

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Anegative electrode | aluminium oxide + cryolite | aluminium

Bnegative electrode | cryolite | aluminium oxide

Cpositive electrode | aluminium oxide | cryolite

Dpositive electrode | aluminium oxide + cryolite | aluminium

✓ Correct answer

D: positive electrode | aluminium oxide + cryolite | aluminium

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Topic: Electrolysis, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2014 Paper 1 Variant 1, question 24.

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