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Edexcel IGCSE Chemistry extraction and uses of metals

Practise metals-use questions by choosing extraction methods, explaining alloy hardness and linking metal properties to applications.

Syllabus
First assessment 2019
Course
Chemistry 4CH1

Exam points

  • Choose electrolysis or carbon extraction from a metal's position relative to carbon.
  • Explain alloy hardness using diagrams showing disrupted layers of metal atoms.
  • Link uses of aluminium, iron or steel to properties such as strength or low density.

Covered syllabus points

2.22C Metal ores and native metals2.23C Extraction method and reactivity2.24C Evaluating metal extraction processes2.25C Uses of aluminium, copper, iron and steel2.26C Alloys2.27C Why alloys are harder

(e) Extraction and uses of metals question 1

[Maximum number: 9]

Question (a)

(a)

The box gives the names of some metals.

Table for Question (a) — Edexcel IGCSE Chemistry
[ 2 ]

Question (i)

(i)

In the Earth, metals are found either in ores or as uncombined elements.

Explain which metal from the box is most likely to be found as an uncombined element.

[ 2 ]

Question (b)

(b)

This is the order of reactivity of four metals.

Figure for Question (b) — Edexcel IGCSE Chemistry


The method used to obtain a metal from its oxide depends on the reactivity of the metal.

Two possible methods are:

Method 1: heating the metal oxide with carbon
Method 2: electrolysis

Explain which method should be used to obtain lead from lead(II) oxide, PbO.
Include an equation for the formation of lead in your answer.

[ 3 ]

Question (c)

(c)

The diagram shows the arrangement of the particles in a pure metal.

Figure for Question (c) — Edexcel IGCSE Chemistry

Metals are often made into alloys to make them harder.
Explain why alloys are harder than pure metals.
Draw a diagram to support your answer.

[ 4 ]

(e) Extraction and uses of metals question 2

[Maximum number: 3]

Iron metal was discovered several thousand years ago. Iron is produced industrially from iron(III) oxide by extraction using carbon.

Sodium is a metal in Group 1 of the Periodic Table. Sodium was discovered by Sir Humphrey Davy in 1807. It is produced industrially by the electrolysis of sodium chloride.

Question (a)

(a)

Explain, using the reactivity series, why carbon can be used to extract iron from iron(III) oxide.

[ 2 ]

Question (b)

(b)

Suggest why sodium was not discovered until 1807.

[ 1 ]

(e) Extraction and uses of metals question 3

[Maximum number: 6]

This question is about metals.

Question (a)

(a)

Aluminium is malleable and can be easily shaped to make saucepans used for cooking food.

State two other properties of aluminium that make it suitable for saucepans used for cooking food.

1 ................................
2 ................................

[ 2 ]

Question (b)

(b)

Magnalium is an alloy of aluminium and magnesium.

The diagram shows how the atoms are arranged in this alloy.

Figure for Question (b) — Edexcel IGCSE Chemistry
[ 4 ]

Question (i)

(i)

State what is meant by the term alloy.

[ 1 ]

Question (ii)

(ii)

Explain why magnalium is harder than aluminium.

[ 3 ]
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