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- 1. Multiple ChoiceWhat is an ore?a solid metala rock cantaining a metal combined with other elementsan elementan object used to row a boat
- 2. Multiple ChoiceWhich of these elements is unlikely to be found native?goldplatinumaluminiumsilver
- 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 Choice
What is oxidation?
loss of oxygen
gain of electrons
gain of hydrogen
gain of oxygen
- 6. Multiple ChoiceWhich element cannot be extracted from its ore by reduction with carbon?ironaluminiumcopperlead
- 7. Multiple ChoiceWhich series is used to predict the reactions of metals with carbon and other elements?reactionary seriesreaction seriesredox seriesreactivity series
- 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
In iron extraction from its ore, the hematite contains silica as an impurity. What reacts with this impurity to remove it?
calcium oxide
carbon
carbon dioxide
oxygen
- 12. Multiple Choice
Which substance is not involved in the extraction of iron from hematite?
carbon
carbon monoxide
nitrogen
calcium carbonate
- 13. Multiple Choice
A chemical engineer plans to build a reaction container for production of hydrochloric acid.
Which metal is best for the reaction container?
copper
iron
magnesium
zinc
- 14. Multiple Choice
Complete the word equation for decomposition of calcium carbonate:
Calcium carbonatecalcium oxide
calcium oxide + carbon dioxide
calcium oxide + water + carbon dioxide
calcium
- 15. Multiple Choice
When a metal reacts with oxygen gas, the product is ...
metal hydroxide
metal oxide
metal oxide and oxygen
metal hydroxide and hydrogen gas
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