O LevelChemistryCambridgeTopic Questions9. Metals9.3 Alloys & their Properties

Alloys & their Properties (Cambridge O Level Chemistry)

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11 mark

Which diagram shows an alloy?

q1-9-2-easy-cie-igcse-chemistry

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21 mark

Zinc has many uses in the home. The diagram shows two items that contain zinc.

q4-9-1-easy-cie-igcse-chemistry

In which of these items is zinc used as an alloy?

  bucket door-knocker
A cross times ✓
B ✓ ✓
C cross times cross times
D ✓ cross times

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31 mark

Why are alloys harder than the pure metals from which they are made?

A There are stronger bonds between the atoms
B The atoms are all the same size 
C The layers of atoms are distorted
D The properties of each element have combined

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11 mark
Brass is an alloy of two metals

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Which is the correct statement? 

  • The alloy will completely dissolve in dilute hydrochloric acid.

  • Brass is formed by a chemical reaction between two metals 

  • Brass can be represented by a chemical formula

  • One of the metals in the alloy will dissolve in dilute hydrochloric acid

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11 mark

The structure of an alloy is shown below. Alloys are mixtures of metals with other metals or non-metals.

q5-9-1-medium-cie-igcse-chemistry

They are usually much stronger and harder than pure metals. Which statement explains these features?

  • The irregular sizes of the atoms distorts the regular arrangement in the metal structure, meaning more force is required to bend the metal

  • The irregular sizes of the atoms distorts the regular arrangement in the metal structure as the bonding is disrupted when the atoms are added

  • The regular sizes of the atoms distorts the irregular arrangement in the metal structure, meaning more force is required to bend the metal

  • A mixture of metals is tougher than a pure metal because a mixture has more intermolecular forces than a pure metal.

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21 mark

The diagram shows the structure of an alloy.

q30-cie-o-level-chemistry-specimen-2023-paper-1

Which statement about alloys is correct?

  • Alloys can only be formed by mixing copper or iron with other metals.

  • Carbon and iron are the only two elements in stainless steel.

  • In an alloy there is attraction between positive ions and a ‘sea’ of delocalized electrons.

  • The alloy brass has a chemical formula.

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