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Quiz testing your knowledge of chemistry in industry section 5 of the IGCSE chemistry exam.

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Chemistry In Industry

Questão 1 de 15

1

Extracting Iron: Choose the CORRECT 3 Raw Materials used in the Blast Furnace...

Selecione uma ou mais das seguintes:

  • Iron Ore/Haematite

  • Calcium Oxide

  • Silicon Dioxide

  • Coke

  • Limestone

Explicação

Questão 2 de 15

1

Selecione das listas do Menu para completar o texto.

Iron is extracted from ( haematite, Metal Iron ) by ( reduction, oxidation ) (i.e. the removal of ( oxygen, hydrogen )) in a blast furnace.

Explicação

Questão 3 de 15

1

Hot air is blasted into the furnace, making the coke burn much faster than usual. The coke burns and produces carbon dioxide:
C + O2 ---> CO2
Carbon + Oxygen ---> Carbon Dioxide

Selecione uma das opções:

  • VERDADEIRO
  • FALSO

Explicação

Questão 4 de 15

1

Preencha o espaço em branco para completar o texto.

Hot air is blasted into the furnace making the coke burn much faster than normal. This raises the temperature to about degrees celsius.

Explicação

Questão 5 de 15

1

The carbon dioxide then reacts with unburnt coke to form carbon monoxide.
CO2 + C --> ?

Selecione uma das seguintes:

  • 2CO

  • CO

  • CO2

Explicação

Questão 6 de 15

1

The carbon monoxide then reduces the iron ore to iron. This means the carbon monoxide is the . The formula for this stage of the reaction is:
3CO + Fe2O3 --> 3CO2 + 2Fe
Carbon monoxide + --> Carbon dioxide +

Arraste e solte para completar o texto.

    reducing agent
    iron (iii) oxide
    Iron

Explicação

Questão 7 de 15

1

After the carbon monoxide has reduced the iron (iii) oxide to iron the iron is molten at this temperature and it's also very dense, so it runs straight to the bottom of the furnace where it's tapped off.

In the furnace which sits on top of the other is it the molten iron or the molten slag?

Selecione uma ou mais das seguintes:

  • molten iron

  • molten slag

Explicação

Questão 8 de 15

1

Preencha os espaços em branco para completar o texto.

The main impurity is (silicon dioxide). This is still , even at 1500 degrees and would tend to stay mixed in with the iron. The removes it.

Explicação

Questão 9 de 15

1

The limestone is decomposed by heat into calcium oxide and CO2.

CaCO3 ---> CaO + CO2 (Thermal Decomposition.)

Selecione uma das opções:

  • VERDADEIRO
  • FALSO

Explicação

Questão 10 de 15

1

Preencha os espaços em branco para completar o texto.

The calcium oxide then reacts with sand to form , or slag which is molten (less dense than molten iron) and can also be tapped off.

CaO+SiO2 --> (molten slag)

Explicação

Questão 11 de 15

1

This cooled slag is solid and is used for: (choose the 2 correct uses)

Selecione uma ou mais das seguintes:

  • Road-building

  • Aeroplane manufacturing

  • Fertiliser

  • Drinking cans

Explicação

Questão 12 de 15

1

The iron ore contains the .
The coke is almost . This is for the iron oxide to iron metal.
The takes away impurities in the form of slag.

Arraste e solte para completar o texto.

    iron
    pure carbon
    reducing
    limestone

Explicação

Questão 13 de 15

1

Uses of Iron and Aluminium: Iron and Aluminium have some properties in common.
1) They are both dense and (shiny)
2) They have - Iron melts at 1538 and aluminium melts at 660.
3) They both have - they're strong and hard to break.
4) Can also be hammered into different shapes. .
5) They are both of electricity and too.

Arraste e solte para completar o texto.

    lustrous
    high melting points
    high tensile strength
    Malleable
    good conductors
    heat energy

Explicação

Questão 14 de 15

1

The uses of iron depend on its properties:

1) Wrought iron - is almost completely . It's so it's used to make ornamental gates and railings.

You can mix iron with other elements to make . E.g.
1) Cast iron: Mixture of iron, carbon and silicon. Hard, brittle and is used for .
2) Steel: Alloy made or iron, carbon and usually some other metals. Harder than pure iron but can still be hammered into sheets and welded together. These properties mean that steel is great for (for construction.)

Main problem is iron corrodes easily. E.g. It
is an alloy made of iron and chromium that doesn't rust. Used for knives and forks and cooking pans.

Arraste e solte para completar o texto.

    pure iron
    malleable
    alloys
    manhole covers and some cooking pans
    making car bodies and girders
    rusts.
    Stainless steel

Explicação

Questão 15 de 15

1

Uses of Aluminium: Unlike iron doesn't easily.
Reacts very quickly with the in the air to form aluminium oxide.
Because Aluminium doesn't corrode useful for products that come into contact with water. E.g.
Aluminium is much , which makes it lighter so used for bicycle frames and

Arraste e solte para completar o texto.

    corrode
    oxygen
    drink cans.
    less dense than iron
    aeroplanes.

Explicação