The blast furnace

Pregunta 1 de 21

1

When air is blown into the blast furnace the coke burns and oxidises. What is this reaction?

❌ = ❌

Arrastra y suelta para completar el texto.

carbon dioxide

carbon + oxygen

coke + oxygen

carbonmonoxide

iron

iron + carbon dioxide

Explicación

Pregunta 2 de 21

2

Why is hot air blasted through the furnace?

Selecciona una de las siguientes respuestas posibles:

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.

Explicación

Pregunta 3 de 21

2

What is dropped into the furnace?

Selecciona una o más de las siguientes respuestas posibles:

Limestone
iron ore
coke
slag
copper
steel

Explicación

Pregunta 4 de 21

2

What are the products of a carbon monoxide and iron oxide reaction?

Selecciona una de las siguientes respuestas posibles:

iron and carbon dioxide
slag and molten iron
oxygen and carbon
carbon and iron
slag and carbon dioxide

Explicación

Pregunta 5 de 21

2

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

Selecciona una de las siguientes respuestas posibles:

solid
liquid
gas

Explicación

Pregunta 6 de 21

2

What is molten slag (impurities) used for?

Selecciona una de las siguientes respuestas posibles:

slag isn't used for anything and must be disposed of when the reactions are complete
roads
airplanes
tools

Explicación

Pregunta 7 de 21

2

In which order do the following reactions happen?

Selecciona una de las siguientes respuestas posibles:

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

Explicación

Pregunta 8 de 21

2

Carbon monoxide is the reducing agent used in the blast furnace.
How is carbon monoxide produced in the furnace?

Selecciona una de las siguientes respuestas posibles:

carbon dioxide gas reacts with coke
limestone and coke react
limestone and carbon dioxide gas react
coke reacts with oxygen

Explicación

Pregunta 9 de 21

2

When an element is reduced it loses electrons in the reaction

Selecciona uno de los siguientes:

VERDADERO
FALSO

Explicación

Pregunta 10 de 21

2

limestone is a sedimentary rock

Selecciona uno de los siguientes:

VERDADERO
FALSO

Explicación

Pregunta 11 de 21

2

What are the advantages to using limestone?

Selecciona una o más de las siguientes respuestas posibles:

bright white in colour
easy to mine
neutralises acid
environment friendly
easily disposed of
breaks down in water

Explicación

Pregunta 12 de 21

1

Zone 3 - what is the main chemical reaction?

❌2❌3(s) + ❌O(g) → ❌ + ❌2(g)

Arrastra y suelta para completar el texto.

Fe

O

C

Fe(s)

O(g)

C(s)

CO

FeO

Explicación

Pregunta 13 de 21

1

Zone 2 - what is the main chemical reaction?

❌2(g) + ❌(s) → ❌(g)

Arrastra y suelta para completar el texto.

CO

FeO

ClO

C

2CO

2FeO

2ClO

Explicación

Pregunta 14 de 21

3

Zone 1 - what is the main chemical reaction?

❌(s) + ❌(g) → ❌(g)

Arrastra y suelta para completar el texto.

C

CO

Fe

O2

CO2

FeO2

ClO

Cl

Explicación

Pregunta 15 de 21

5

Iron ore, limestone and ❌ are fed into the top of the furnace. Then ❌ is blasted through the furnace. ❌ in the hot air reacts with ❌ to form ❌ and then the carbon dioxide reacts with the coke to form ❌. This gas reacts with ❌ changing it to ❌. In the end the ❌ reacts with the ❌ to form ❌ which runs to the bottom of the furnace where it ❌ the molten iron. During this process the ❌ runs to the bottom of the furnace where it is ❌.

Arrastra y suelta para completar el texto.

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

Explicación

Pregunta 16 de 21

1

Then at high temperatures, carbon dioxide gas reacts with more coke and is therefore reduced. What is this reaction?

❌ = ❌

Arrastra y suelta para completar el texto.

carbon dioxide + carbon

carbon dioxide + coke

oxygen + carbon

carbon + dioxide + coke

carbonmonoxide

carbon dioxide

reduction

Explicación

Pregunta 17 de 21

1

How is carbon dioxide formed in a blast furnace?

❌ --> ❌

Arrastra y suelta para completar el texto.

carbon + oxygen

oxygen + coke

oxygen + iron

carbon + dioxide

carbon dioxide

Explicación

Pregunta 18 de 21

1

How is carbon monoxide formed in a blast furnace?

❌ --> ❌

Arrastra y suelta para completar el texto.

carbon dioxide + iron oxide

carbon + carbon dioxide

iron + carbon + oxygen

oxygen + carbon

carbon monoxide

carbon dioxide

Explicación

Pregunta 19 de 21

1

How is iron formed in a blast furnace?

❌ --> ❌

Arrastra y suelta para completar el texto.

carbon monoxide + iron oxide

iron + oxygen

iron oxide + carbon dioxide

carbon dioxide + iron

iron

oxygen + iron

Explicación

Pregunta 20 de 21

1

Selecciona la opción correcta de los menús desplegables para completar el texto.

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

( Fe, CO )( 2, 3, 4 )( O, Fe )( 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 )

	Creado por Imani :D hace más de 9 años