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Essential Chemistry for IGCSE - Metal Extraction (Section 2)

1
Which of the following is an advantage of recycling metals?
Answer
(B)
It requires less energy compared to extraction.
2
Which gas is primarily responsible for reducing iron ore in a blast furnace?
Answer
(C)
Carbon monoxide (CO)
3
Which substances are produced by the reaction between iron ore (Fe2O3) and carbon monoxide in the blast furnace?
Answer
A
B
4
What element is primarily added to iron to create stainless steel?
Answer
(C)
Chromium
5
What are the typical uses of high-carbon steel?
Answer
A
C
6
Which substance is used in the blast furnace to remove impurities and form slag?
Answer
(D)
Limestone
7
What is the role of calcium oxide (CaO) in the blast furnace?
Answer
(A)
To remove impurities.
8
What is the name of the furnace commonly used for extracting iron from its ore?
Answer
(B)
Blast furnace
9
In the extraction of zinc, what is the main role of carbon monoxide (CO)?
Answer
(B)
To reduce zinc oxide
10
In the basic oxygen converter, what element is primarily removed from the iron?
Answer
(C)
Carbon
11
Which of the following are advantages of using alloys?
Answer
A
B
D
12
Which of the following is formed during the reaction of carbon and oxygen in a blast furnace?
Answer
(C)
Carbon monoxide
13
What is the role of carbon (coke) in the extraction of iron?
Answer
(D)
Both to provide heat and act as a reducing agent.
14
What type of furnace is primarily used for the conversion of iron into steel?
Answer
(C)
Basic Oxygen Furnace
15
Besides chromium, what element is often included in stainless steel?
Answer
(A)
Nickel
16
What are the main components used in a blast furnace to extract iron?
Answer
(A)
Iron ore, carbon, and air
17
What gas is primarily used to reduce iron ore in the blast furnace?
Answer
(C)
Carbon monoxide
18
Which of the following is a common use for brass?
Answer
(C)
Making electrical wiring
19
What type of chemical reaction is most crucial in extracting a metal from its ore?
Answer
(C)
Reduction
20
What process is used to remove carbon from molten iron to make steel?
Answer
(C)
Basic oxygen converter
21
Which materials are often recycled?
Answer
A
B
C
D
22
What is the role of roasting in the zinc extraction process?
Answer
(B)
To convert zinc sulfide to zinc oxide.
23
What are some common uses of aluminum?
Answer
A
B
C
D
24
What are the main products of the blast furnace process?
Answer
A
B
C
25
What is the role of the reducing agent in the extraction of metals?
Answer
(B)
To remove oxygen from the metal ore
26
What are the major products of the blast furnace process?
Answer
A
B
C
27
Which of the following is an advantage of using alloys?
Answer
(B)
The corrosion resistance usually increases
28
Which substance is used as a reducing agent in the blast furnace for iron extraction?
Answer
(B)
Carbon Monoxide
29
In the steelmaking process, what is the purpose of the basic oxygen converter?
Answer
(B)
To remove carbon and impurities from iron.
30
Which of the following best describes the reactivity series of metals?
Answer
(C)
A list of metals ranked by their ability to lose electrons.
31
What material is typically added to the blast furnace to remove impurities from the iron ore?
Answer
(B)
Limestone
32
What is the main advantage of using aluminum in aircraft construction?
Answer
(C)
Low weight
33
What is the primary purpose of adding chromium to steel?
Answer
(B)
To make it more resistant to corrosion
34
What is the primary source of zinc in the zinc extraction process?
Answer
(C)
Zinc blende
35
Which of the following best describes the role of flux in the blast furnace?
Answer
(B)
To remove impurities and form slag.
36
In steelmaking, what are some of the main impurities that need to be removed from the iron?
Answer
(A)
Carbon and silicon
37
What are the benefits of recycling metals?
Answer
A
B
C
38
In the reactivity series, how are metals ordered?
Answer
(D)
By increasing ease of losing electrons.
39
What is the primary purpose of the basic oxygen converter in steelmaking?
Answer
(B)
To remove impurities from iron.
40
Why is it necessary to remove impurities from iron ore before it is used in a blast furnace?
Answer
(D)
To prevent the formation of unwanted products.
41
What is the main purpose of 'coke' in the blast furnace?
Answer
(B)
To provide heat and a reducing agent
42
What is the role of coke in the blast furnace process?
Answer
(D)
To increase the melting point.
43
Which materials are essential in the blast furnace?
Answer
A
B
C
44
Which of the following are considered major environmental impacts related to mining and metal extraction?
Answer
A
B
C
45
Which metal is primarily extracted from bauxite ore?
Answer
(C)
Aluminum
46
Which of the following metals is extracted from its ore using electrolysis?
Answer
(C)
Aluminum
47
What process is used for obtaining aluminum?
Answer
(B)
Electrolysis
48
What are the advantages of recycling metals?
Answer
A
B
C
49
What is the most common method of obtaining aluminum from its ore, bauxite?
Answer
(B)
Electrolysis of molten alumina.
50
Which furnace is used to remove carbon and other impurities from iron to produce steel?
Answer
(C)
Basic Oxygen Converter