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SingaporeCombined ScienceQuick questions
Chemistry: Metals and Organic Chemistry
Quick questions on Extraction of metals and the blast furnace explained: O-Level Combined Science
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is electrolysis of aluminium?Show answer
Aluminium is above carbon, so carbon cannot reduce its oxide; electrolysis is used. Aluminium oxide is dissolved in molten cryolite to lower the melting point, then electrolysed:
What is q1?Show answer
State the method used to extract a metal that is more reactive than carbon, and give one example. [2 marks]
What is q2?Show answer
Write the equation for the reduction of iron(III) oxide by carbon monoxide. [2 marks]
What is q3?Show answer
Explain why aluminium oxide is dissolved in molten cryolite before electrolysis. [2 marks]
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