O LevelChemistryCambridgeExam Questions9. Metals9.2 Uses of Metals

Uses of Metals (Cambridge O Level Chemistry)

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9.2 Uses of Metals

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9.2 Uses of Metals

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1a1 mark
Table 1.1 shows the properties of four substances.

                         Table 1.1q5a_specimen-paper-0620-03-cie-igcse-chemistry

State the property of aluminium given in Table 1.1 which makes it suitable for the manufacture of aircraft.

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1b2 marks

Aluminium is used in overhead electricity cables.

Give two properties of aluminium that make it suitable for use in overhead electricity cables.

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1c1 mark

c) The diagrams show part of the structures of five substances, A, B, C, D and E.q1-0620_s19_qp_33

Which one of these structures, A, B, C, D or E,  is used in electrical wiring?

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1a3 marks

Brass is an alloy which contains zinc.

i)
Name the other metal in brass.
[1]
ii)
Suggest two reasons why an alloy such as brass is preferred to either of its constituent metals.
[2]

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1b5 marks

In an experiment to investigate the rate of rusting of steel, three pieces of steel were used. One piece of steel was completely coated with copper, one piece was completely coated with zinc and the third piece was left uncoated. All three pieces were left exposed to the atmosphere.

i)
Explain why the uncoated piece started to rust.
[1]
ii)
The coating on both of the other two pieces was scratched, exposing the steel.
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The piece of steel coated with zinc still did not rust but the copper-coated piece of steel rusted very rapidly.
Explain these observations in terms of the formation of ions and the transfer of electrons.
[4]

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