Sign In

Essential Chemistry for IGCSE - Metal Extraction (Section 4)

1
Which of these is a common use for brass?
Answer
(B)
Making musical instruments
2
What are some applications of aluminium?
Answer
A
B
3
Which metal is commonly alloyed with steel to increase its hardness?
Answer
(B)
Manganese
4
Which of the following is produced by the basic oxygen process?
Answer
(C)
Steel
5
What type of reaction takes place when zinc sulfide is roasted?
Answer
(B)
Oxidation
6
What is the role of carbon in the extraction of iron in the blast furnace?
Answer
(C)
To provide heat and act as a reducing agent.
7
Which metal is added to steel to increase its resistance to corrosion and produce stainless steel?
Answer
(C)
Chromium
8
What is the main difference between stainless steel and normal steel?
Answer
(B)
Stainless steel contains chromium to prevent rust.
9
During zinc extraction, what process follows roasting?
Answer
(B)
Smelting with carbon
10
Which process is used to remove impurities from the molten iron?
Answer
(A)
Oxidation
11
What are the essential ingredients for the basic oxygen steelmaking process?
Answer
A
B
C
12
In the blast furnace, what is the purpose of the limestone?
Answer
(B)
To remove impurities by forming slag.
13
What is the main purpose of a flux in metal extraction?
Answer
(C)
To remove impurities.
14
What is the primary function of the coke in the blast furnace process?
Answer
(B)
To provide heat and a reducing agent.
15
What type of metal is extracted by electrolysis?
Answer
(D)
Aluminum
16
What is a common application of an alloy?
Answer
(B)
To create materials with specific properties.
17
Which of the following is not a property of steel?
Answer
(D)
Poor conductivity
18
Why is recycling metals often beneficial?
Answer
A
B
19
Which of the following statement(s) about the reactivity series is correct?
Answer
A
C
D
20
Which of the following best describes the process of 'smelting'?
Answer
(A)
Heating an ore to its melting point to extract a metal.
21
In the extraction of zinc, what is the role of roasting?
Answer
(A)
To convert zinc sulfide to zinc oxide.
22
Why is carbon used as a reducing agent in metal extraction?
Answer
(A)
It easily loses electrons.
23
What is the function of the lining in the basic oxygen converter used in steelmaking?
Answer
(D)
To protect the steel from the converter's walls.
24
Which metal is used as a coating on the surface of steel to prevent corrosion?
Answer
(B)
Zinc
25
What happens to the impurities that are present in molten iron during steel making?
Answer
(B)
They form the slag.
26
What is the primary reducing agent used in the blast furnace?
Answer
(C)
Coke
27
In the extraction of iron, why is limestone added to the blast furnace?
Answer
(B)
To remove impurities.
28
What is the main advantage of adding chromium to steel?
Answer
(C)
Increases corrosion resistance
29
In the blast furnace, what is the role of coke, specifically in the context of the chemical reactions?
Answer
(B)
To act as a reducing agent.
30
Which of the following elements is not typically found in the raw materials of a blast furnace?
Answer
(D)
Copper
31
What is the role of the basic oxygen converter?
Answer
(A)
To turn iron into steel.
32
What are the main products of the blast furnace?
Answer
A
B
C
33
What type of furnace is primarily used to extract iron from its ore?
Answer
(B)
Blast furnace
34
Which of the following metals is extracted by electrolysis?
Answer
(C)
Aluminum
35
What are the main products of the basic oxygen steelmaking process?
Answer
(A)
Steel and slag
36
What is the primary source of iron in the blast furnace?
Answer
(C)
Iron ore
37
What is the name of the main process used to extract iron from its ore in large quantities?
Answer
(C)
Blast furnace
38
Which of the following are advantages of recycling metals?
Answer
A
B
C
39
What is the process that removes impurities from steel in the basic oxygen converter?
Answer
(A)
Oxidation
40
What is the purpose of using a flux in metal extraction such as limestone?
Answer
(B)
To remove the impurities present in the ore.
41
Which of the following can be recycled?
Answer
A
B
C
D
42
Which is the main process to refine the iron obtained from the blast furnace?
Answer
(C)
Basic oxygen process
43
What are the key raw materials used in a blast furnace?
Answer
A
B
C
44
What determines the position of a metal in the reactivity series?
Answer
(B)
The metal's reaction to oxygen
45
Which of the following is not a common method for extracting metals from their ores?
Answer
(C)
Heating the ore
46
Which of the following is a disadvantage of recycling metals?
Answer
(B)
It can sometimes be more energy-intensive than extracting ore.
47
In the extraction of Zinc, what are the two main steps used after roasting?
Answer
(B)
Reduction and distillation
48
Which raw material is used as a source of carbon in the blast furnace?
Answer
(C)
Coke
49
What is slag primarily composed of?
Answer
(B)
Calcium silicate
50
What is the main ore used for extracting zinc?
Answer
(C)
Zinc Blende