O LevelChemistryCambridgeExam Questions9. Metals9.3 Alloys & their Properties

Alloys & their Properties (Cambridge O Level Chemistry)

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9.3 Alloys & their Properties

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9.3 Alloys & their Properties

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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

        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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        11 mark
        Brass is an alloy of two metals

        .

        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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