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Essential Chemistry for IGCSE - The Chemical Industry (Section 4)

1
What is the effect of a catalyst on the equilibrium of the Haber process?
Answer
(D)
It does not affect the equilibrium.
2
What is the main industrial use of sulfur dioxide?
Answer
(A)
Making sulfuric acid
3
What is required for the Haber process?
Answer
A
C
4
What are the factors that will improve the yield of sulfuric acid in the Contact process?
Answer
C
A
5
What is a use of calcium hydroxide?
Answer
A
B
6
What process is used to manufacture ammonia (NH3)?
Answer
(A)
The Haber process
7
What substances are made from calcium hydroxide?
Answer
A
D
8
What is the purpose of cracking in the production of ammonia?
Answer
(B)
To provide hydrogen
9
What compound is produced when calcium oxide reacts with water?
Answer
(B)
Calcium hydroxide
10
What are the standard conditions for the Haber process?
Answer
(B)
450°C, 200 atm
11
What are some important uses of limestone?
Answer
A
B
D
12
Which conditions favour a high yield of ammonia in the Haber process?
Answer
B
C
13
What is the role of the catalyst in the Haber process?
Answer
(B)
To increase the rate of the reaction
14
Which compound is a typical fertilizer component, containing phosphorus?
Answer
(B)
Ammonium phosphate
15
What conditions are maintained to increase the rate of a reaction?
Answer
A
C
16
In the Contact process, why is sulfur trioxide absorbed in concentrated sulfuric acid instead of water?
Answer
(B)
To prevent the formation of acid mist.
17
Which conditions give the greatest yield of ammonia during the Haber Process?
Answer
(C)
Low temperature and high pressure
18
What process is used to make ammonium sulfate?
Answer
(C)
Reacting ammonia with sulfuric acid
19
What happens to limestone when it undergoes thermal decomposition?
Answer
(B)
It produces carbon dioxide
20
What is the primary goal of the chemical industry concerning food production?
Answer
(C)
To improve crop yields and quality.
21
What is produced when calcium carbonate (limestone) is heated?
Answer
(B)
Calcium oxide and carbon dioxide
22
What does sulfuric acid react with to form a salt and hydrogen?
Answer
(C)
Metals
23
What are the products of the thermal decomposition of limestone?
Answer
A
B
24
What is a benefit of using a catalyst in the Haber process?
Answer
(B)
It allows a lower temperature to be used.
25
What is the main raw material for producing sulfur dioxide?
Answer
(A)
Sulfur
26
What is the role of the iron catalyst in the Haber process?
Answer
(B)
To speed up the reaction.
27
Which of the following are uses of limestone?
Answer
A
B
D
28
What are the main reactants in the Haber process?
Answer
(B)
Nitrogen and hydrogen
29
What is the balanced chemical equation for the production of ammonia in the Haber process?
Answer
(B)
N2 + 3H2 -> 2NH3
30
What is formed when calcium oxide reacts with water?
Answer
(B)
Calcium hydroxide
31
Which of the following is the correct chemical name for quicklime?
Answer
(B)
Calcium oxide
32
What is the purpose of dissolving sulfur trioxide in concentrated sulfuric acid during the Contact process?
Answer
(B)
To prevent the formation of an acid mist.
33
What is the formula for sulfuric acid?
Answer
(C)
H2SO4
34
What is the chemical name for slaked lime?
Answer
(C)
Calcium hydroxide
35
Which of the following reactions is used to produce sulfur trioxide (SO3) in the Contact Process?
Answer
(B)
SO2 + O2 -> SO3
36
What are the primary nutrients that fertilisers provide to plants?
Answer
(B)
Nitrogen, phosphorus, potassium
37
In the Contact process, what is produced in the catalytic converter?
Answer
(C)
Sulfur trioxide
38
What reactants are needed for sulfuric acid production via the contact process?
Answer
A
B
C
39
Which of the following is not one of the main components of fertiliser?
Answer
(D)
Calcium
40
What is the other name for calcium hydroxide?
Answer
(B)
Slaked lime
41
What is the purpose of a catalyst in the Contact process?
Answer
(C)
To convert sulfur dioxide to sulfur trioxide
42
What is the name of the method that is used to make ammonium sulfate fertiliser?
Answer
(B)
By reacting ammonia with sulfuric acid.
43
What is produced when the elements nitrogen and hydrogen react together?
Answer
(B)
Ammonia
44
What are the main conditions used in the Haber process?
Answer
(B)
Low temperature and high pressure.
45
Which chemical is produced from sulfur dioxide in industry?
Answer
(B)
Sulfuric acid
46
What is the key characteristic of the thermal decomposition of limestone?
Answer
(A)
It is endothermic
47
What is the product when calcium oxide reacts with water?
Answer
(B)
Calcium hydroxide
48
In the Contact process, what is the first step of obtaining sulfur dioxide?
Answer
(A)
Burning sulfur in air
49
Which group of elements is most essential for plant growth?
Answer
(B)
Nitrogen, phosphorus, and potassium
50
What substance is used to absorb sulfur trioxide in the Contact process?
Answer
(C)
Concentrated sulfuric acid