WorksheetsExtraction of metals
Total questions: 25
Worksheet time: 50mins
Which of the following things are commonly made from metals?
jewellery
steel beams
electrical cables
rails for railway tracks
all of these things
Metals have different levels of reactivity, and they are found in different forms in the earth's crust. Reactive metals are usually found . . .
in compounds in the earth's crust.
as pure metals in the earth’s crust.
Unreactive metals are usually found . . .
in compounds in the earth's crust.
as pure metals in the earth’s crust.
Most metals are extracted from their ores. What is a metal ore?
any rock containing a metal
a rock that contains enough of a metal compound to make extracting the metal financially worthwhile
a nugget of pure metal
Which two of the following chemical processes are used to extract metals from their ores?
carbon reduction
electrolysis
thermal decomposition
How is a metal extracted from a metal compound by carbon reduction?
A metal compound is heated with carbon to produce the metal and carbon dioxide.
A compound is split into its elements using electricity.
Why is electrolysis not used to extract all metals?
Electrolysis isn't very effective at extracting metals.
Electrolysis is cheaper than carbon reduction.
Electrolysis is expensive because it requires a large amount of electricity.
Which method of metal extraction is used to extract metals that are less reactive than carbon?
carbon reduction
electrolysis
Which method of metal extraction is used to extract metals that are more reactive than carbon?
carbon reduction
electrolysis
Which method of metal extraction is used to extract lead?
carbon reduction
electrolysis
Which method of metal extraction is used to extract aluminium?
carbon reduction
electrolysis
Why is Iron extracted by carbon reduction?
Lead is less reactive than carbon.
Lead is more reactive than carbon
Which method of metal extraction is used to extract zinc, and why? Select one method and one reason.
carbon reduction
electrolysis
Zinc is less reactive than carbon.
Zinc is more reactive than carbon.
Which method of metal extraction is used to extract Magnesium, and why? Select one method and one reason.
carbon reduction
electrolysis
Magnesium is less reactive than carbon.
Magnesium is more reactive than carbon.
Zinc, copper and iron are found as oxides in rocks that are dug out of the ground. A rock that contains metal compounds worth extracting is called a
metal ore
metal oxide
metal compound
We can extract a metal from its oxide by heating it with carbon as long as it's ______ reactive than carbon.
more
less
Which of these metals can be extracted from their oxides by being heated with carbon?
aluminium
calcium
copper
iron
potassium
Which of these metals cannot be extracted from their oxides by being heated with carbon?
aluminium
copper
iron
magnesium
sodium
When a metal is extracted from its oxide using carbon, the products of the reaction are a metal and carbon dioxide gas. Which is the general word equation for extracting a metal from its oxide using carbon?
equation A
equation B
equation C
What is the correct word equation for extracting copper from copper oxide?
equation A
equation B
equation C
Copper and carbon dioxide are formed when copper is extracted from copper oxide using carbon. What happens to the carbon dioxide formed in the reaction?
It escapes into the air.
It reacts with copper and undergoes a displacement reaction.
Which equation is a balanced symbol equation representing the reaction shown?
equation A
equation B
equation C
Hot air is blasted into the bottom of a blast furnace. Oxygen in the air reacts with carbon, forming carbon monoxide.
Select the equation for the reaction between carbon and oxygen.
equation A
equation B
equation C
Carbon monoxide then reacts with iron oxide to form iron and carbon dioxide. Select the equation for the reaction between carbon monoxide and iron oxide.
equation A
equation B
equation C
Which equation is a balanced symbol equation representing the reaction shown?
equation A
equation B
equation C
