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The blast furnace

Beschreibung

The blast furnace quiz on IGCSE level
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Zusammenfassung der Ressource

Frage 1

Frage
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]
Antworten
  • carbon dioxide
  • carbon + oxygen
  • coke + oxygen
  • carbonmonoxide
  • iron
  • iron + carbon dioxide

Frage 2

Frage
Why is hot air blasted through the furnace?
Antworten
  • 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.
  • 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.

Frage 3

Frage
What is dropped into the furnace?
Antworten
  • Limestone
  • iron ore
  • coke
  • slag
  • copper
  • steel

Frage 4

Frage
What are the products of a carbon monoxide and iron oxide reaction?
Antworten
  • iron and carbon dioxide
  • slag and molten iron
  • oxygen and carbon
  • carbon and iron
  • slag and carbon dioxide

Frage 5

Frage
Is iron a solid, liquid or a gas when it forms at 1500 degrees Celsius?
Antworten
  • solid
  • liquid
  • gas

Frage 6

Frage
What is molten slag (impurities) used for?
Antworten
  • slag isn't used for anything and must be disposed of when the reactions are complete
  • roads
  • airplanes
  • tools

Frage 7

Frage
In which order do the following reactions happen?
Antworten
  • IRON FORMS then CARBON MONOXIDE FORMS then CARBON DIOXIDE FORMS
  • CARBON DIOXIDE FORMS then CARBON MONOXIDE FORMS then IRON FORMS
  • CARBON MONOXIDE FORMS then CARBON DIOXIDE FORMS then IRON FORMS
  • 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

Frage 8

Frage
Carbon monoxide is the reducing agent used in the blast furnace. How is carbon monoxide produced in the furnace?
Antworten
  • carbon dioxide gas reacts with coke
  • limestone and coke react
  • limestone and carbon dioxide gas react
  • coke reacts with oxygen

Frage 9

Frage
When an element is reduced it loses electrons in the reaction
Antworten
  • True
  • False

Frage 10

Frage
limestone is a sedimentary rock
Antworten
  • True
  • False

Frage 11

Frage
What are the advantages to using limestone?
Antworten
  • bright white in colour
  • easy to mine
  • neutralises acid
  • environment friendly
  • easily disposed of
  • breaks down in water

Frage 12

Frage
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)
Image:
93876285-7d82-450e-b971-78ff2aef3581.gif (image/gif)
Antworten
  • Fe
  • O
  • C
  • Fe(s)
  • O(g)
  • C(s)
  • CO
  • FeO

Frage 13

Frage
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)
Image:
a82edb36-b57d-433e-b307-0bf9ca9bda70.gif (image/gif)
Antworten
  • CO
  • FeO
  • ClO
  • C
  • 2CO
  • 2FeO
  • 2ClO

Frage 14

Frage
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)
Image:
7d9c5f6c-bcfe-447c-b330-f4c16ee64c21.gif (image/gif)
Antworten
  • C
  • CO
  • Fe
  • O2
  • CO2
  • FeO2
  • ClO
  • Cl

Frage 15

Frage
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].
Antworten
  • 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

Frage 16

Frage
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]
Antworten
  • carbon dioxide + carbon
  • carbon dioxide + coke
  • oxygen + carbon
  • carbon + dioxide + coke
  • carbonmonoxide
  • carbon dioxide
  • reduction

Frage 17

Frage
How is carbon dioxide formed in a blast furnace? [blank_start]carbon + oxygen[blank_end] --> [blank_start]carbon dioxide[blank_end]
Antworten
  • carbon + oxygen
  • oxygen + coke
  • oxygen + iron
  • carbon + dioxide
  • carbon dioxide

Frage 18

Frage
How is carbon monoxide formed in a blast furnace? [blank_start]carbon dioxide + iron oxide[blank_end] --> [blank_start]carbon monoxide[blank_end]
Antworten
  • carbon dioxide + iron oxide
  • carbon + carbon dioxide
  • iron + carbon + oxygen
  • oxygen + carbon
  • carbon monoxide
  • carbon dioxide

Frage 19

Frage
How is iron formed in a blast furnace? [blank_start]carbon monoxide + iron oxide[blank_end] --> [blank_start]carbon dioxide + iron[blank_end]
Antworten
  • carbon monoxide + iron oxide
  • iron + oxygen
  • iron oxide + carbon dioxide
  • carbon dioxide + iron
  • iron
  • oxygen + iron

Frage 20

Frage
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]
Antworten
  • 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

Frage 21

Frage
What was this reaction?
Antworten
  • oxidation
  • reduction
  • redox
  • none of those
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