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Essential Chemistry for IGCSE - The Chemical Industry (Section 6)

1
What is a key characteristic of the Haber process?
Answer
(C)
Production of ammonia
2
Which of the following equations correctly represents the reaction in which limestone decomposes?
Answer
(B)
CaCO3 -> CaO + CO2
3
What does sulfur dioxide react with to form sulfur trioxide?
Answer
(C)
Oxygen
4
What is the common name for calcium hydroxide?
Answer
(B)
Slaked lime
5
Which compound is formed by reacting sulfur with oxygen?
Answer
(B)
Sulfur dioxide
6
Which of the following is the formula of ammonium nitrate?
Answer
(C)
NH4NO3
7
In the manufacture of sulfuric acid, what happens to the sulfur trioxide?
Answer
(B)
It is dissolved in concentrated sulfuric acid.
8
What is the main purpose of fertilisers?
Answer
(B)
To provide essential nutrients to plants.
9
What is the purpose of the catalyst in the Contact process?
Answer
(B)
To convert sulfur dioxide to sulfur trioxide.
10
What is the purpose of high pressure in the Haber process?
Answer
(D)
To increase the yield of ammonia.
11
Where does the nitrogen used in the Haber process come from?
Answer
(B)
Air
12
What are some uses of calcium hydroxide?
Answer
A
B
13
What is the approximate temperature used in the Haber process?
Answer
(B)
450 °C
14
What is the chemical formula for calcium hydroxide?
Answer
(C)
Ca(OH)2
15
Which of the following statements correctly describes the role of a catalyst in the Haber process?
Answer
(B)
It increases the rate of the reaction.
16
What is formed when calcium carbonate is heated?
Answer
(C)
Calcium oxide and carbon dioxide
17
In the Contact process, what are the reactants used to produce sulfur trioxide (SO3)?
Answer
A
B
18
What is used to make limestone products?
Answer
A
B
D
19
Which of the following are essential for the contact process?
Answer
A
B
C
20
What is the name of the process used to make ammonia?
Answer
(A)
The Haber process
21
What is the main source of nitrogen for fertilizer production?
Answer
(B)
Atmospheric nitrogen
22
What is the temperature in the Haber process?
Answer
(B)
450 °C
23
In the Contact process, sulfur dioxide is converted to sulfur trioxide. What catalyst is used?
Answer
(C)
Vanadium(V) oxide
24
What is the chemical formula for calcium oxide?
Answer
(B)
CaO
25
What is the final product of the Contact process?
Answer
(C)
Sulfuric acid
26
Which conditions are ideal for the Contact process to make sulfur trioxide?
Answer
(B)
Low temperature and low pressure
27
Which substance is used to absorb the sulfur trioxide in the Contact process?
Answer
(C)
Concentrated sulfuric acid
28
What does sulfur dioxide do?
Answer
A
B
C
29
Which of the following is a raw material in the production of sulfuric acid?
Answer
(A)
Sulfur
30
In the Contact process, how is sulfur trioxide converted to sulfuric acid?
Answer
(B)
By dissolving it in concentrated sulfuric acid, then adding water.
31
Why is a catalyst used in the Haber process?
Answer
(C)
To speed up the reaction
32
What is the effect of increasing pressure on the yield of ammonia in the Haber process?
Answer
(B)
Increases the yield
33
What is one of the raw materials in the contact process?
Answer
(C)
Oxygen
34
What is the function of the rotating kiln in the limestone industry?
Answer
(B)
To heat and decompose limestone.
35
What are some uses of limestone?
Answer
A
B
C
36
What is produced when sulfur dioxide reacts with oxygen in the presence of a catalyst?
Answer
(B)
Sulfur trioxide
37
What is the main purpose of the Contact process?
Answer
(C)
To produce sulfuric acid
38
What is an example of a typical fertiliser compound?
Answer
(B)
Ammonium nitrate
39
Which is a raw material for sulfur dioxide production?
Answer
(D)
All of the above
40
What is the function of a catalyst in the Haber process?
Answer
(B)
To increase the rate of the reaction.
41
What is the approximate temperature at which sulfur dioxide is converted to sulfur trioxide in the Contact process?
Answer
(D)
600°C
42
What are the raw materials used to produce ammonia in the Haber process?
Answer
A
B
43
What is the source of hydrogen for ammonia production?
Answer
(C)
Natural gas
44
What are the main products of the thermal decomposition of limestone?
Answer
A
B
45
What is quicklime?
Answer
(B)
Calcium oxide