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- 1. Multiple Choice
Ores are naturally occurring rocks that contain metals or metal compounds in sufficient amounts to make it worthwhile . . .
recycling the element
extracting the metal
to set up a mine
to use the metal
- 2. Multiple Choice
Which of these elements is likely to be found in its natural state?
iron
sodium
aluminium
silver
- 3. Multiple ChoiceWhat is the removal of oxygen from a substance called?reductionextractionelectrolysisoxidation
- 4. Multiple ChoiceWhat is the addition of oxygen to a substance called?decompositionreductionoxidationextraction
- 5. Multiple ChoiceWhat is oxidation?loss of oxygengain of electronsgain of hydrogenloss of electrons
- 6. Multiple Choice
Which element cannot be extracted from its ore by reduction with carbon?
iron
magnesium
copper
lead
- 7. Multiple Choice
Which of these elements would you expect to see just below carbon in the metal reactivity series?
lithium
aluminium
calcium
zinc
- 8. Multiple ChoiceWhat is the name of the process that uses electricity to separate the elements in a compound?reductionelectrolysisextractionmining
- 9. Multiple ChoiceHow could you extract sodium from molten sodium chloride?reduction by carbonelectrolysisdecompositionoxidation
- 10. Multiple ChoiceHow would you best extract iron from haematite (iron ore)?reduction by carbonelectrolysisdecompositionoxidation
- 11. Multiple Choice
What state is needed for electrolysis of a metal compound?
molten (liquid)
solid
gaseous
any state will do
- 12. Multiple Choice
Why does the carbon anode need regular replacement in the electrolysis of aluminium oxide?
carbon is brittle and breaks down easily
it melts at the high temperatures
carbon reacts with the oxygen produced
it dissolves
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