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- 1. Multiple Choice
What is the name of the ore that contains aluminum
Bauxite
Cryolite
Aluminum oxide
Heamatite
- 2. Multiple Choice
Which is not a reason that cryolite is used in aluminum extraction?
Cryolite dissolves aluminum oxide
Cryolite reduces the melting point of aluminum oxide
Cryolite decreases the cost of aluminum extraction
Cryolite removes impurities from aluminum oxide
- 3. Multiple Choice
The positive electrode is called the
anode
cathode
- 4. Multiple Choice
The negative electrode is called the
anode
cathode
- 5. Multiple Choice
Aluminum ions are attracted to the
anode
cathode
- 6. Multiple Choice
Oxide ions are attracted to the
cathode
anode
- 7. Multiple Choice
In aluminum extraction the electrodes are made of
carbon (graphite)
aluminum and oxygen
platinum
steel
- 8. Multiple Choice
The anode has to be replaced frequently because
The oxygen reacts with the carbon anode to form carbon dioxide
Aluminum reacts with the carbon to form aluminum carbide
The anode gets impurities that impact the extraction
The anode is too hot and it will reduce their electrical conductivity
- 9. Multiple ChoiceWhat is an ore?a solid metala rock cantaining a metal combined with other elementsan elementan object used to row a boat
- 10. Multiple ChoiceWhich of these elements is unlikely to be found native?goldplatinumaluminiumsilver
- 11. Multiple ChoiceWhat is the removal of oxygen from a substance called?reductionextractionelectrolysisoxidation
- 12. Multiple ChoiceWhat is the addition of oxygen to a substance called?decompositionreductionoxidationextraction
- 13. Multiple ChoiceWhat is oxidation?loss of oxygengain of electronsgain of hydrogenloss of electrons
- 14. Multiple ChoiceWhich element cannot be extracted from its ore by reduction with carbon?ironaluminiumcopperlead
- 15. Multiple ChoiceWhich series is used to predict the reactions of metals with carbon and other elements?reactionary seriesreaction seriesredox seriesreactivity series
- 16. Multiple ChoiceWhat is the name of the process that uses electricity to separate the elements in a compound?reductionelectrolysisextractionmining
- 17. Multiple Choice
What do you add to aluminium ore to reduce its melting temperature?
Dendrite
Malachite
Bauxite
Cryolite
- 18. Multiple Choice
Which answer is not the reason why cathode is located at the bottom of the electrolytic cell?
so that the bubbles produced will not be trapped in the molten aluminium
so that molten aluminium can be collected easily
to prevent oxygen contact with molten aluminium
because it is easier to attract heavier ions at the bottom
- 19. Multiple Choice
Which is the wrong observation in extracting aluminum using electrolysis?
size of the anode getting smaller
size of the cathode getting bigger
fizzing at the anode
silver liquid formed at the cathode
- 20. Multiple Choice
To extract aluminum, the electrolyte must be molten aluminum oxide. Why water must not be present in the electrolyte?
hydrogen gas will be produced instead of aluminum.
water will be reacted with aluminum oxide.
the yield of aluminum will be lesser.
it will cause an explosion.
- Answer choicesTagsAnswer choicesTags