The blast furnace

Question 1 of 21

1

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

❌ = ❌

Drag and drop to complete the text.

carbon dioxide

carbon + oxygen

coke + oxygen

carbonmonoxide

iron

iron + carbon dioxide

Explanation

Question 2 of 21

2

Why is hot air blasted through the furnace?

Select one of the following:

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.

Explanation

Question 3 of 21

2

What is dropped into the furnace?

Select one or more of the following:

Limestone
iron ore
coke
slag
copper
steel

Explanation

Question 4 of 21

2

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

Select one of the following:

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

Explanation

Question 5 of 21

2

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

Select one of the following:

solid
liquid
gas

Explanation

Question 6 of 21

2

What is molten slag (impurities) used for?

Select one of the following:

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

Explanation

Question 7 of 21

2

In which order do the following reactions happen?

Select one of the following:

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

Explanation

Question 8 of 21

2

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

Select one of the following:

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

Explanation

Question 9 of 21

2

When an element is reduced it loses electrons in the reaction

Select one of the following:

True
False

Explanation

Question 10 of 21

2

limestone is a sedimentary rock

Select one of the following:

True
False

Explanation

Question 11 of 21

2

What are the advantages to using limestone?

Select one or more of the following:

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

Explanation

Question 12 of 21

1

Zone 3 - what is the main chemical reaction?

❌2❌3(s) + ❌O(g) → ❌ + ❌2(g)

Drag and drop to complete the text.

Fe

O

C

Fe(s)

O(g)

C(s)

CO

FeO

Explanation

Question 13 of 21

1

Zone 2 - what is the main chemical reaction?

❌2(g) + ❌(s) → ❌(g)

Drag and drop to complete the text.

CO

FeO

ClO

C

2CO

2FeO

2ClO

Explanation

Question 14 of 21

3

Zone 1 - what is the main chemical reaction?

❌(s) + ❌(g) → ❌(g)

Drag and drop to complete the text.

C

CO

Fe

O2

CO2

FeO2

ClO

Cl

Explanation

Question 15 of 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 ❌.

Drag and drop to complete the text.

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

Explanation

Question 16 of 21

1

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

❌ = ❌

Drag and drop to complete the text.

carbon dioxide + carbon

carbon dioxide + coke

oxygen + carbon

carbon + dioxide + coke

carbonmonoxide

carbon dioxide

reduction

Explanation

Question 17 of 21

1

How is carbon dioxide formed in a blast furnace?

❌ --> ❌

Drag and drop to complete the text.

carbon + oxygen

oxygen + coke

oxygen + iron

carbon + dioxide

carbon dioxide

Explanation

Question 18 of 21

1

How is carbon monoxide formed in a blast furnace?

❌ --> ❌

Drag and drop to complete the text.

carbon dioxide + iron oxide

carbon + carbon dioxide

iron + carbon + oxygen

oxygen + carbon

carbon monoxide

carbon dioxide

Explanation

Question 19 of 21

1

How is iron formed in a blast furnace?

❌ --> ❌

Drag and drop to complete the text.

carbon monoxide + iron oxide

iron + oxygen

iron oxide + carbon dioxide

carbon dioxide + iron

iron

oxygen + iron

Explanation

Question 20 of 21

1

Select from the dropdown lists to complete the text.

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 )

	Created by Imani :D almost 10 years ago