GCE O-Level · Chemistry (6092)

Structure and Properties of Materials: Practice Questions

2 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Structure and Properties of Materials.

7 questions20 marksFree, no account

Question 1

1 mark

Which statement correctly describes why graphite can conduct electricity while diamond cannot?

Question 2

1 mark

An alloy is generally harder and stronger than the pure metal from which it is derived. Which statement best explains this property in terms of structure?

Question 3

3 marks

Explain why graphite is able to conduct electricity while diamond cannot.

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Question 4

5 marks

Explain, in terms of structure and bonding, why sodium chloride has a high melting point whereas methane has a very low melting point.

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Question 5

2 marks

Define the term isotopes in terms of sub-atomic particles.

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Question 6

3 marks

Substances can be classified as elements, compounds, or mixtures based on their composition and properties.

(a) Describe one difference between a compound and a mixture in terms of their composition. (1 point)

(b) Brass and stainless steel are examples of alloys.
(i) Define the term alloy. (1 point)
(ii) Explain why alloys like brass are generally harder and stronger than the pure metals from which they are made. (1 point)

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Question 7

5 marks

A metal specimen X is thought to be an alloy of copper and zinc.
(a) Describe the structure of a pure metal and explain why it is malleable.
(b) Explain, in terms of its structure, why the alloy X is stronger and harder than pure copper.
(c) State the name of the common alloy made from copper and zinc.

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