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Extraction Of Metals And Reduction (GCSE Chemistry)

The following is a GCSE Chemistry test covering 'Extraction Of Metals And Reduction' from the broader topic Chemical Changes. The test is geared towards the AQA exam board style syllabus.
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Which statement about the thermite reaction (iron(III) oxide + aluminium) is correct in the context of metal extraction?
In the extraction of copper from copper(II) oxide using carbon, which species is oxidised?
Which half-equation shows reduction at the cathode during electrolysis of molten aluminium oxide?
Which gas is produced when coke (carbon) reacts with oxygen in the blast furnace and then reduces iron oxide?
Which process describes removal of oxygen from a metal oxide by passing carbon monoxide over it (common in industrial extraction)?
Which environmental concern is most directly associated with using coke (carbon) as the reducing agent in large-scale metal extraction?
Why are many metals extracted from their ores in a molten state during electrolysis rather than from aqueous solution?
Which of these metals would most likely be found native (occurring uncombined) and so be extractable without reduction?
Which of these is an advantage of extracting metals by electrolysis compared with reduction by carbon?
Copper can be extracted from ores by reduction with carbon where appropriate. Which method is commonly used to extract copper from low-grade ores?
In the Hall–Héroult process for aluminium, what is the role of cryolite (Na3AlF6)?