A-LevelChemistryElectrochemistryMay/June 2011Paper 1 Q31 Mark
Aluminium is the most abundant metal in the Earth's crust. The extraction of aluminium is carried out by the electrolysis of aluminium oxide dissolved in molten cryolite. Which material is used for each of the electrodes in this electrolysis?
Aanode: aluminium, cathode: carbon
Banode: carbon, cathode: carbon
Canode: carbon, cathode: steel
Danode: steel, cathode: aluminium
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of electrochemistry within the Chemistrysyllabus. The examiner's mark scheme requires...
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Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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