Uses of aluminium
1 mark · EasyWhy does aluminium not corrode easily in air?
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Aluminium forms a thin, strong layer of oxide that protects it.
Must show: Oxide layer
Also accept: It forms a protective aluminium oxide layer
Common mistakes: Aluminium does not react with oxygen (which is false)
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Marking points
B1 · 1 mark · Mentions formation of a (protective/thin/strong) oxide layer.
Worked solution
Aluminium forms a thin, strong oxide layer that prevents further corrosion.