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Essential Chemistry for IGCSE - The Chemical Industry (Section 3)

1
What is the chemical formula of the catalyst used in the Haber process?
Answer
(B)
Fe
2
What is the function of the catalyst in the Haber process?
Answer
(C)
To increase the rate of reaction.
3
Which gas is produced during the decomposition of limestone?
Answer
(C)
Carbon dioxide
4
What is the name of the process used to obtain calcium oxide?
Answer
(A)
Decomposition
5
What is formed when a metal reacts with a dilute acid?
Answer
(C)
Salt and hydrogen
6
Which process is used to extract sulfur from underground?
Answer
(C)
Frasch process
7
What are the raw materials needed for making ammonia?
Answer
(B)
Nitrogen and hydrogen.
8
What type of reaction is used to convert sulfur dioxide to sulfur trioxide in the Contact Process?
Answer
(A)
Combination reaction
9
Which of the following are formed when limestone is heated strongly?
Answer
A
B
10
What gas, essential for the Haber process, comes from the air?
Answer
(C)
Nitrogen
11
What type of raw material is used in the Haber process?
Answer
(D)
Air
12
What is the role of a catalyst in a chemical reaction?
Answer
(C)
To speed up the rate of reaction.
13
What is the chemical formula for the catalyst used in the Contact process?
Answer
(B)
V2O5
14
Which substance is crucial for the formation of ammonia in the Haber process?
Answer
(B)
Hydrogen
15
What is the optimal temperature used in the Haber Process, and why is this temperature used?
Answer
(A)
450°C, to achieve a high yield and reasonable rate.
16
Which of the following is a benefit of using the Contact process?
Answer
A
C
17
Which of the following is a major source of sulfur dioxide for the manufacture of sulfuric acid?
Answer
(A)
Burning of pure sulfur
18
In the Haber process, what is the main function of the catalyst?
Answer
(C)
To speed up the reaction.
19
Which of these is formed during the decomposition of limestone?
Answer
B
C
20
What is formed by the reaction of sulfuric acid with a metal?
Answer
(A)
Salt and hydrogen.
21
What is the function of using a catalyst in the contact process?
Answer
(C)
To speed up the reaction
22
Which is the best description of a catalyst in the Haber process?
Answer
(B)
It increases the rate of reaction but does not affect the yield.
23
What is the process used for extracting sulfur from underground?
Answer
(C)
Frasch process
24
What is the main use of sulfuric acid in the chemical industry?
Answer
(B)
To make fertilizers.
25
In the Contact process, SO3 is converted to sulfuric acid. What is necessary to complete this step?
Answer
(A)
Water
26
What is the name of the industrial process used to produce sulfuric acid?
Answer
(B)
Contact process
27
What raw material is used to make hydrogen for the Haber process?
Answer
(B)
Methane
28
What are the reactants in the Contact Process?
Answer
(C)
Sulfur dioxide and oxygen.
29
What is the chemical formula for ammonia?
Answer
(A)
NH3
30
What is the chemical formula for sulfur dioxide?
Answer
(C)
SO2
31
Which of the following gases is used to produce sulfuric acid?
Answer
A
C
32
What is the purpose of adding water to concentrated sulfuric acid?
Answer
(B)
To dilute the acid in a controlled manner.
33
What is the role of limestone in a blast furnace?
Answer
(B)
To remove impurities from the iron ore.
34
What is produced from sulfur dioxide and used in the Contact process?
Answer
(A)
Sulfur trioxide.
35
Which compound is used in the manufacture of ammonium sulfate fertilizer?
Answer
(A)
Ammonia solution and sulfuric acid.
36
What are the advantages of using the Haber process?
Answer
A
B
37
Which of the following is not a product of limestone decomposition?
Answer
(B)
Calcium carbonate
38
Which of the following is a common use of calcium oxide (lime)?
Answer
(C)
Removing impurities from steel making
39
What are the main products produced in the thermal decomposition of limestone?
Answer
(C)
Calcium oxide and carbon dioxide.
40
What are the primary products of the Frasch process?
Answer
(B)
Sulfur and water
41
What is the role of limestone in the limestone industry?
Answer
(A)
It is a raw material for the production of cement.
42
What type of reaction is represented by the thermal decomposition of limestone?
Answer
(B)
Decomposition
43
What is the function of water in making quicklime from limestone?
Answer
(B)
To react with the calcium oxide.
44
Which of the following is the name of the reaction used to produce ammonia?
Answer
(C)
Haber
45
In the Contact process, what is the function of the sulfur dioxide converter?
Answer
(B)
To oxidize sulfur dioxide to sulfur trioxide.
46
What are the two main uses of limestone?
Answer
A
B
C
47
Which of the following is a reactant in the Contact process?
Answer
(B)
Sulfur dioxide
48
What does the Frasch process extract?
Answer
(B)
Sulfur
49
What are the optimal conditions, in terms of temperature and pressure, to maximize the yield of ammonia in the Haber process?
Answer
(C)
Low temperature and high pressure
50
What is the role of the catalyst in the Contact process?
Answer
(B)
To convert sulfur dioxide to sulfur trioxide