Chemistry Unit C1 Worksheet - Study And Revision Pack (Foundation Paper) Page 23
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34Q3.
(a) Unreactive metals are found as uncombined metals in the Earth's crust.
Which of the following metals is found uncombined in the Earth's crust?
(1)
Put a cross (
) in the box next to your answer.
A gold
B sodium
C tin
D zinc
(b) When iron oxide is heated with carbon, the iron oxide is reduced.
(i) Complete the word equation for the reaction.
(2)
iron oxide + carbon → . . . . . . . . . . . . . . . . . . . + . . . . . . . . . . . . . . . . . . .
(ii) State what is meant by reduced.
(1)
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(iii) Part of the reactivity series is shown.
sodium
aluminium
zinc
iron
copper
Aluminium is found in the ore bauxite.
Aluminium is obtained from bauxite by electrolysis.
Explain why electrolysis has to be used to obtain aluminium from bauxite.
(2)
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(c) A large amount of copper in use today has come from recycling copper.
Explain the advantages of recycling metals, such as copper, rather than obtaining them from their
ores.
(2)
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(Total for Question is 8 marks)
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