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Essential Chemistry for IGCSE - Metal Extraction (Section 1)

1
What are some of the disadvantages of recycling metals?
Answer
A
B
2
What is the main function of the blast furnace in extracting iron?
Answer
(C)
To reduce iron ore
3
Which of the following metals is extracted by electrolysis?
Answer
(C)
Aluminum
4
What is the role of limestone in the iron extraction process?
Answer
(C)
To remove impurities as slag.
5
What is the primary purpose of using alloys?
Answer
A
B
D
6
What is the purpose of adding manganese to steel?
Answer
(B)
To increase the hardness and strength.
7
Which of the following is used in the Hall-Héroult process for aluminum extraction?
Answer
(B)
Electrolysis
8
Which of these metals is commonly used in the construction of aircraft?
Answer
(C)
Aluminum
9
Which are common benefits of using alloys?
Answer
A
B
D
10
In the zinc extraction process, what is the purpose of roasting zinc sulfide?
Answer
(B)
To convert zinc sulfide to zinc oxide
11
What is the main advantage of the basic oxygen process in steelmaking?
Answer
(C)
It is highly efficient and quick.
12
What is the role of carbon monoxide in the extraction of zinc?
Answer
(C)
To reduce zinc oxide to zinc.
13
Which ore is used to extract aluminum?
Answer
(B)
Bauxite
14
What process does carbon play a crucial role in within the context of metal extraction?
Answer
(C)
Reduction
15
What is formed when limestone is added to the blast furnace?
Answer
A
C
16
What is a key benefit of using aluminum in the construction of aircraft?
Answer
(C)
Low weight.
17
During the extraction of iron in a blast furnace, which of the following is/are the primary raw materials used?
Answer
A
B
C
D
18
What process is used to extract aluminum from bauxite?
Answer
(B)
Electrolysis
19
What are some of the common uses of brass?
Answer
A
B
20
Which gas is involved in the formation of carbon monoxide (CO) inside the blast furnace?
Answer
(B)
Carbon dioxide
21
Which of the following is a major component of slag produced in a blast furnace?
Answer
(C)
Calcium silicate
22
Which of the following is used to make stainless steel?
Answer
A
B
23
Which of these is the core chemical reaction in metal extraction?
Answer
(B)
Reduction
24
What substance acts as the reducing agent in the blast furnace?
Answer
(C)
Carbon monoxide
25
What is the role of oxygen in the basic oxygen steelmaking process?
Answer
(A)
To react with carbon
26
Which process is used in the final stages of converting iron into steel?
Answer
(C)
Basic Oxygen Process
27
Which material acts as the reducing agent in the blast furnace?
Answer
(B)
Coke
28
Which of these metals is often extracted by electrolysis?
Answer
(C)
Aluminum
29
Which of the following is an example of a reducing agent in the metal extraction process?
Answer
A
C
30
What element is commonly added to steel to make it resistant to corrosion?
Answer
(C)
Chromium
31
Why is air heated before being injected into a blast furnace?
Answer
(A)
To increase the rate of reaction.
32
What is the fundamental chemical process in metal extraction?
Answer
(B)
Reduction
33
Which of the following are common impurities in the iron produced in a blast furnace?
Answer
A
B
C
34
What is the name of the main ore used to extract iron?
Answer
(C)
Hematite
35
In the context of metal extraction, what does 'reduction' mean?
Answer
(A)
The gain of electrons
36
In a blast furnace, which substance provides the necessary heat?
Answer
(C)
Coke
37
What is the name of the main ore from which aluminum is extracted?
Answer
(B)
Bauxite
38
What is the primary source of carbon used in the blast furnace to reduce iron ore?
Answer
(B)
Coke
39
In the context of metal extraction, which type of reaction is often used to separate a metal from its ore?
Answer
(B)
Reduction
40
The most common method of extracting metals involves:
Answer
(B)
Heating with carbon
41
What is the main role of coke in the blast furnace?
Answer
(D)
To make slag.
42
What are some advantages of alloys over pure metals?
Answer
A
B
43
What is the reducing agent in the blast furnace reaction?
Answer
(C)
Carbon monoxide
44
Which of the following is an advantage of using aluminum in aircraft construction?
Answer
(C)
Low weight.
45
What is the purpose of roasting zinc sulfide in zinc extraction?
Answer
(B)
To convert zinc sulfide to zinc oxide.
46
What are some significant environmental issues related to metal extraction?
Answer
A
B
C
47
Which of the following is/are the byproducts of the blast furnace process?
Answer
A
B
C
48
What elements are typically added to iron to produce stainless steel?
Answer
A
B
49
What are some of the main factors that need to be considered when choosing a method for metal extraction?
Answer
A
B
C
D
50
In the context of metal extraction and reactivity, which element is most often used for reduction?
Answer
(B)
Carbon