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Essential Chemistry for IGCSE - The Chemical Industry (Section 1)

1
Which process is used to obtain sulfur from underground deposits?
Answer
(C)
Frasch Process.
2
What is meant by the term 'yield' in chemical industry?
Answer
(C)
The amount of product obtained.
3
Why is a catalyst used in the Contact Process?
Answer
(C)
To increase the reaction rate.
4
In the Haber process, what is the temperature commonly used, and why?
Answer
(B)
450°C, to achieve a balance between yield and reaction rate.
5
How is the rate of the reaction improved in the Haber process?
Answer
(B)
Using a catalyst
6
Which of the following is a raw material used in the production of sulfuric acid?
Answer
(B)
Sulfur
7
What happens to the yield of ammonia as temperature increases in the Haber process?
Answer
(B)
Decreases
8
What is the main source of nitrogen used in the Haber process?
Answer
(C)
Air
9
What is the purpose of using high concentration in the Contact process?
Answer
(A)
To increase reaction rate.
10
Which substance is a byproduct during the manufacture of sulfuric acid?
Answer
(C)
Sulfur trioxide.
11
What is the primary raw material used in the Frasch process?
Answer
(A)
Sulfur
12
Which of the following is a chemical reaction involved in the production of sulfuric acid?
Answer
A
C
13
What is formed when ammonia reacts with sulfuric acid?
Answer
(A)
Ammonium sulfate
14
Which of the following is an example of a fertilizer?
Answer
(C)
Ammonium nitrate.
15
Which gas is formed during the thermal decomposition of limestone?
Answer
(B)
Carbon Dioxide
16
What is the role of a 'catalyst' in the Contact process?
Answer
(A)
To speed up the reaction between sulfur dioxide and oxygen.
17
Which of the following is NOT a use of sulfuric acid?
Answer
(D)
Making ammonia
18
What is the chemical formula for sulfuric acid?
Answer
(C)
H2SO4
19
What is the main chemical produced in the Haber process?
Answer
(A)
Ammonia
20
What is the chemical name for quicklime?
Answer
(B)
Calcium oxide
21
Which element is essential in the production of fertilizers to promote plant growth?
Answer
(C)
Nitrogen
22
Why is sulfur dioxide converted to sulfur trioxide in the Contact process?
Answer
(B)
Sulfur trioxide reacts with water to produce sulfuric acid.
23
What is the catalyst used in the manufacture of ammonia by the Haber Process?
Answer
(B)
Iron
24
In the Contact process, what conditions favor the forward reaction of SO2 to SO3?
Answer
B
C
25
What happens to the reaction rate if a catalyst is used?
Answer
(A)
Increases
26
Which substance is used in the Contact process to absorb sulfur trioxide and produce sulfuric acid?
Answer
(C)
Concentrated sulfuric acid
27
What type of chemical reaction is involved in the Haber process?
Answer
(C)
Synthesis
28
What gas is released when limestone reacts with acid?
Answer
(B)
Carbon Dioxide
29
What is an indicator of the yield of a product?
Answer
(C)
The percentage of product formed.
30
What are the essential raw materials for manufacturing ammonia?
Answer
(C)
Nitrogen and hydrogen
31
Which gas is produced by burning sulfur?
Answer
(B)
Sulfur dioxide
32
In the Contact process, what is the purpose of the sulfur trioxide absorber?
Answer
(D)
To absorb SO3 into concentrated sulfuric acid
33
In the Frasch process, what state is sulfur in when it is extracted?
Answer
(B)
Liquid
34
What is the major function of a fertilizer?
Answer
(B)
To supply essential nutrients to plants.
35
What happens to the yield of ammonia in the Haber process when the temperature is increased?
Answer
(B)
It decreases.
36
Which of the following is produced by the Frasch process?
Answer
(B)
Sulfur
37
Which of the following is a use of limestone?
Answer
B
C
D
38
In the manufacture of ammonia which of the following conditions increase the yield of ammonia?
Answer
A
B
39
What is the temperature required for the conversion of sulfur dioxide to sulfur trioxide in the Contact Process?
Answer
(C)
450°C
40
In the limestone industry, what is the main product formed by the thermal decomposition of limestone?
Answer
(C)
Calcium oxide
41
Which of the following is the main product of the thermal decomposition of calcium carbonate (limestone)?
Answer
(B)
Calcium oxide (lime)
42
What are the optimal conditions to increase the yield in the Haber process?
Answer
B
C
43
Which of the following is the catalyst used in the Haber Process?
Answer
(B)
Iron
44
What is the name of the process used to extract sulfur from underground deposits?
Answer
(A)
Frasch process
45
What type of fuel is used to crack hydrocarbons for the production of hydrogen in the making of ammonia?
Answer
(A)
Natural Gas
46
What type of substance is limestone?
Answer
(C)
A salt
47
What is the primary function of fertilizers?
Answer
(B)
To supply essential nutrients to plants.
48
What is the source of nitrogen used in the Haber process?
Answer
(B)
Air
49
What is the name of the reaction in which sulfur dioxide is converted to sulfur trioxide?
Answer
(B)
Combination.
50
What is the role of a catalyst?
Answer
(C)
To speed up the reaction.