Lesson T8.1.2
T8.1.2 Carbon and obtaining metals from oxides Quiz: KS3 Chemistry, Unit 8
20 questions
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Lesson T8.1.2, Carbon and obtaining metals from oxides: 20 multiple choice questions for the KS3 Chemistry (National Curriculum), Unit 8: Materials, written with Revision Ninja.
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The 20 questions
-
What is formed when a metal oxide is heated with carbon?
- Metal and carbon dioxide
- Metal and carbon monoxide
- Metal oxide and water
- Metal and oxygen gas
-
What is chemical reduction in terms of oxygen?
- Addition of carbon
- Removal of oxygen
- Removal of carbon
- Addition of oxygen
-
Iron oxide is heated with carbon. Which product is formed?
- Iron carbonate
- Iron metal
- Iron sulfate
- Iron hydroxide
-
Which metal can be extracted from its oxide by heating with carbon?
- Iron
- Sodium
- Aluminium
- Potassium
-
Why cannot aluminium be extracted by heating its oxide with carbon?
- Aluminium is a liquid
- Carbon is too dense
- Aluminium is above carbon
- Carbon is too expensive
-
What is the main ore of iron used in extraction?
- Iron chloride
- Iron nitrate
- Iron sulfate
- Iron oxide
-
Which substance is used in a blast furnace to reduce iron oxide?
- Bitumen
- Bauxite
- Limestone
- Coke
-
Which metal is extracted by heating its oxide with carbon?
- Sodium
- Zinc
- Calcium
- Magnesium
-
What gas is produced when carbon reduces a metal oxide?
- Nitrogen dioxide
- Oxygen gas
- Hydrogen peroxide
- Carbon dioxide
-
Why is carbon extraction useful for metals below carbon in reactivity?
- It is cheap
- It is magnetic
- It is explosive
- It creates polymers
-
Which metals must be extracted from their ores using electrolysis?
- Found uncombined
- Transition metals
- More reactive than carbon
- Less reactive than carbon
-
Iron oxide is reacted with carbon at high temperature. What is removed from the iron oxide?
- Hydrogen
- Iron
- Oxygen
- Carbon
-
What type of reaction is extracting iron from iron oxide with carbon?
- Thermal decomposition
- Reduction
- Combustion
- Neutralisation
-
Why does copper not need electrolysis to be extracted from its oxide?
- It is a liquid
- It is below carbon
- It is a gas
- It is magnetic
-
How must a metal's reactivity compare to carbon for carbon extraction to work?
- More reactive
- Non-existent
- Less reactive
- Equally reactive
-
Which of these metals can carbon extract from its oxide by heating?
- Tin
- Calcium
- Sodium
- Lithium
-
Why is extracting metals using carbon classified as a reduction reaction?
- Oxygen is added
- Heat is absorbed
- Oxygen is removed
- Carbon is removed
-
Which metal would most likely need electrolysis to be extracted from its ore?
- Silver
- Sodium
- Platinum
- Mercury
-
Why are unreactive metals like gold found uncombined in nature?
- They melt easily
- They do not react
- They dissolve in water
- They react with air
-
Which process is used to extract aluminium from its oxide?
- Heating with carbon
- Electrolysis
- Displacement with iron
- Neutralisation with acid
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