Lesson 4.10.1.4
4.10.1.4 Alternative methods of extracting metals (HT only) Quiz: AQA Chemistry, Unit 10
20 questions
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Lesson 4.10.1.4, Alternative methods of extracting metals (HT only): 20 multiple choice questions for the AQA GCSE Chemistry (8462), Unit 10: Using resources, written with Revision Ninja.
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The 20 questions
-
What does phytomining use to absorb metal compounds?
- Electrolysis
- Bacteria
- Plants
- Scrap iron
-
What do bioleaching processes use to extract metals?
- Fungi
- Algae
- Bacteria
- Plants
-
What is produced when harvested plants are burned in phytomining?
- Ash containing metals
- Toxic gas only
- Molten copper metal
- Pure liquid leachate
-
Copper can be obtained from solutions of copper compounds by displacement using what?
- Scrap gold
- Carbon dust
- Sodium chloride
- Scrap iron
-
Besides displacement, how else can copper be obtained from solutions?
- Filtration only
- Distillation
- Titration
- Electrolysis
-
Which traditional mining problem do biological extraction methods avoid?
- Cooling furnaces
- Digging up rocks
- Using electricity
- Melting metals
-
What type of ore is used in phytomining and bioleaching?
- Low-grade ores
- Pure metal nuggets
- Molten slag
- High-grade ores
-
What is the plant-based step in phytomining?
- Leaching with bacteria
- Displacement with iron
- Electrolysis of solution
- Burning harvested plants
-
A solution of metal compounds is formed by bacteria. What is this solution called?
- Sludge
- Effluent
- Leachate
- Ash
-
What is formed when copper solutions react with scrap iron?
- Iron solution only
- Copper oxide
- Copper metal
- Iron oxide
-
What is a major advantage of bioleaching over traditional mining?
- Uses pure oxygen
- Produces no waste
- Requires high heat
- Avoids digging rock
-
Why are alternative biological metal extraction methods being developed?
- Bactericides failed
- Plant growth slowed
- Metals are cheaper
- Ores are scarce
-
After obtaining metal compounds from phytomining, what is the next step?
- Filtering the soil
- Planting more seeds
- Cooling the ash
- Processing the compounds
-
Which of these is a biological method of metal extraction?
- Fractional distillation
- Cracking
- Phytomining
- Thermal decomposition
-
During displacement of copper using scrap iron, what happens to the iron?
- Iron forms a coating
- Iron is oxidised
- Iron is reduced
- Iron remains unreacted
-
What does a leachate solution contain?
- Plastic
- Metal compounds
- Pure oxygen
- Only sand
-
What characterises a low-grade copper source?
- Found underground only
- High metal purity
- Low copper content
- Pure copper crystals
-
What organisms are used in bioleaching?
- Bacteria
- Algae
- Viruses
- Fungi
-
Why are phytomining and bioleaching classed as biological methods?
- Require solar power
- Produce no energy
- Use mineral acids
- Use living organisms
-
Which metal is the focus of the phytomining and bioleaching examples?
- Sodium
- Copper
- Aluminium
- Gold
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