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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 half-equation shows reduction at the cathode during electrolysis of molten aluminium oxide?
Why can sodium metal not be produced by reducing sodium oxide with carbon?
Which of these is an advantage of extracting metals by electrolysis compared with reduction by carbon?
Which of these metals would most likely be found native (occurring uncombined) and so be extractable without reduction?
What is the main purpose of flux (e.g., limestone) in a smelting furnace?
Copper can be extracted from ores by reduction with carbon where appropriate. Which method is commonly used to extract copper from low-grade ores?
Metal ores are often oxides. Which process describes converting a metal oxide into the metal by removing oxygen using carbon?
During reduction of a metal oxide MXOy using carbon, which new compound does the carbon typically form?
What is a primary reason for recycling metals rather than extracting new metal from ores?
Which environmental concern is most directly associated with using coke (carbon) as the reducing agent in large-scale metal extraction?
Which process describes removal of oxygen from a metal oxide by passing carbon monoxide over it (common in industrial extraction)?