9.2 Uses of Metals (Cambridge (CIE) O Level Chemistry): Flashcards
Exam code: 5070
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- FrontUses of Metals
Give two reasons why aluminium is used for overhead electrical cables rather than copper.
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Give two reasons why aluminium is used for overhead electrical cables rather than copper.
Aluminium is used for overhead electrical cables because it has a low density, making cables lighter to support over long distances, while still being a good conductor of electricity.
Copper is used for electrical wiring because it is a good conductor of ______ and is ______, so it can be drawn into thin wires.
Copper is used for electrical wiring because it is a good conductor of electricity and is ductile, so it can be drawn into thin wires.
True or False?
Copper is used for water pipes because it does not react with water under normal conditions.
True.
Copper does not react with water under normal conditions, which makes it suitable for use in water pipes.
Aluminium is used for food and drink cans because it has a low ______ and does not ______.
Aluminium is used for food and drink cans because it has a low density and does not corrode.
Why is aluminium preferred over iron for making aircraft frames?
Aluminium is preferred because it has a much lower density than iron, making aircraft lighter and reducing fuel consumption.
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