1831015
Questão 1
Questão
When air is blown into the blast furnace the coke burns and oxidises. What is this reaction?
[blank_start]carbon + oxygen[blank_end] = [blank_start]carbon dioxide[blank_end]
Responda
-
carbon dioxide
-
carbon + oxygen
-
coke + oxygen
-
carbonmonoxide
-
iron
-
iron + carbon dioxide
Questão 2
Questão
Why is hot air blasted through the furnace?
Responda
-
The air contains oxygen. The oxygen allows the coke (carbon) to burn and form carbon dioxide. This reaction gives out heat, i.e., it is exothermic, so it heats up the furnace.
-
The air contains oxygen. The oxygen allows the iron ore to burn and form carbon dioxide. This reaction gives out heat, i.e., it is exothermic, so it heats up the furnace.
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The air contains oxygen. The oxygen allows the limestone to burn and form carbon monoxide. This reaction gives out heat, i.e., it is exothermic, so it heats up the furnace.
Questão 3
Questão
What is dropped into the furnace?
Responda
-
Limestone
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iron ore
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coke
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slag
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copper
-
steel
Questão 4
Questão
What are the products of a carbon monoxide and iron oxide reaction?
Responda
-
iron and carbon dioxide
-
slag and molten iron
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oxygen and carbon
-
carbon and iron
-
slag and carbon dioxide
Questão 5
Questão
Is iron a solid, liquid or a gas when it forms at 1500 degrees Celsius?
Responda
-
solid
-
liquid
-
gas
Questão 6
Questão
What is molten slag (impurities) used for?
Responda
-
slag isn't used for anything and must be disposed of when the reactions are complete
-
roads
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airplanes
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tools
Questão 7
Questão
In which order do the following reactions happen?
Responda
-
IRON FORMS then CARBON MONOXIDE FORMS then CARBON DIOXIDE FORMS
-
CARBON DIOXIDE FORMS then CARBON MONOXIDE FORMS then IRON FORMS
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CARBON MONOXIDE FORMS then CARBON DIOXIDE FORMS then IRON FORMS
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IRON FORMS then CARBON DIOXIDE FORMS then CARBON MONOXIDE FORMS
-
CARBON DIOXIDE FORMS then IRON FORMS then CARBON MONOXIDE FORMS
-
CARBON MONOXIDE FORMS then IRON FORMS then CARBON DIOXIDE FORMS
Questão 8
Questão
Carbon monoxide is the reducing agent used in the blast furnace.
How is carbon monoxide produced in the furnace?
Responda
-
carbon dioxide gas reacts with coke
-
limestone and coke react
-
limestone and carbon dioxide gas react
-
coke reacts with oxygen
Questão 9
Questão
When an element is reduced it loses electrons in the reaction
Responda
- True
- False
Questão 10
Questão
limestone is a sedimentary rock
Responda
- True
- False
Questão 11
Questão
What are the advantages to using limestone?
Responda
-
bright white in colour
-
easy to mine
-
neutralises acid
-
environment friendly
-
easily disposed of
-
breaks down in water
Questão 12
Questão
Zone 3 - what is the main chemical reaction?
[blank_start]Fe[blank_end]2[blank_start]O[blank_end]3(s) + [blank_start]C[blank_end]O(g) → [blank_start]Fe(s)[blank_end] + [blank_start]CO[blank_end]2(g)
Responda
-
Fe
-
O
-
C
-
Fe(s)
-
O(g)
-
C(s)
-
CO
-
FeO
Questão 13
Questão
Zone 2 - what is the main chemical reaction?
[blank_start]CO[blank_end]2(g) + [blank_start]C[blank_end](s) → [blank_start]2CO[blank_end](g)
Responda
-
CO
-
FeO
-
ClO
-
C
-
2CO
-
2FeO
-
2ClO
Questão 14
Questão
Zone 1 - what is the main chemical reaction?
[blank_start]C[blank_end](s) + [blank_start]O2[blank_end](g) → [blank_start]CO2[blank_end](g)
Responda
-
C
-
CO
-
Fe
-
O2
-
CO2
-
FeO2
-
ClO
-
Cl
Questão 15
Questão
Iron ore, limestone and [blank_start]coke[blank_end] are fed into the top of the furnace. Then [blank_start]hot air[blank_end] is blasted through the furnace. [blank_start]Oxygen[blank_end] in the hot air reacts with [blank_start]carbon[blank_end] to form [blank_start]carbon dioxide[blank_end] and then the carbon dioxide reacts with the coke to form [blank_start]carbon monoxide[blank_end]. This gas reacts with [blank_start]iron oxide[blank_end] changing it to [blank_start]iron[blank_end]. In the end the [blank_start]limestone[blank_end] reacts with the [blank_start]impurities[blank_end] to form [blank_start]slag[blank_end] which runs to the bottom of the furnace where it [blank_start]floats on top of[blank_end] the molten iron. During this process the [blank_start]molten iron[blank_end] runs to the bottom of the furnace where it is [blank_start]tapped off[blank_end].
Responda
-
coke
-
hot air
-
Oxygen
-
carbon
-
carbon dioxide
-
carbon monoxide
-
iron oxide
-
iron
-
limestone
-
impurities
-
slag
-
floats on top of
-
mixes with
-
molten iron
-
tapped off
-
separated from the slag
Questão 16
Questão
Then at high temperatures, carbon dioxide gas reacts with more coke and is therefore reduced. What is this reaction?
[blank_start]carbon dioxide + carbon[blank_end] = [blank_start]carbonmonoxide[blank_end]
Responda
-
carbon dioxide + carbon
-
carbon dioxide + coke
-
oxygen + carbon
-
carbon + dioxide + coke
-
carbonmonoxide
-
carbon dioxide
-
reduction
Questão 17
Questão
How is carbon dioxide formed in a blast furnace?
[blank_start]carbon + oxygen[blank_end] --> [blank_start]carbon dioxide[blank_end]
Responda
-
carbon + oxygen
-
oxygen + coke
-
oxygen + iron
-
carbon + dioxide
-
carbon dioxide
Questão 18
Questão
How is carbon monoxide formed in a blast furnace?
[blank_start]carbon dioxide + iron oxide[blank_end] --> [blank_start]carbon monoxide[blank_end]
Responda
-
carbon dioxide + iron oxide
-
carbon + carbon dioxide
-
iron + carbon + oxygen
-
oxygen + carbon
-
carbon monoxide
-
carbon dioxide
Questão 19
Questão
How is iron formed in a blast furnace?
[blank_start]carbon monoxide + iron oxide[blank_end] --> [blank_start]carbon dioxide + iron[blank_end]
Responda
-
carbon monoxide + iron oxide
-
iron + oxygen
-
iron oxide + carbon dioxide
-
carbon dioxide + iron
-
iron
-
oxygen + iron
Questão 20
Questão
Write out the fully balanced equation for the reaction that the resulting gas will have with iron.
- When a number is placed after an element it is regarded as a subscript. Before an element it is regarded as a coefficient
[blank_start]Fe[blank_end][blank_start]2[blank_end][blank_start]O[blank_end][blank_start]3[blank_end] + [blank_start]3[blank_end][blank_start]CO[blank_end] ---> [blank_start]2[blank_end][blank_start]Fe[blank_end] + [blank_start]3[blank_end][blank_start]CO[blank_end][blank_start]2[blank_end]
Responda
-
Fe
-
CO
-
O
-
Fe
-
2
-
3
-
4
-
3
-
2
-
4
-
3
-
2
-
4
-
CO
-
C
-
O
-
Fe
-
2
-
3
-
4
-
Fe
-
CO
-
O
-
C
-
3
-
2
-
4
-
CO
-
C
-
O
-
Fe
-
2
-
3
-
4
Questão 21
Questão
What was this reaction?
Responda
-
oxidation
-
reduction
-
redox
-
none of those
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