← Chemistry (4CH1)
Q1 / 5
Reactivity series
Higher
2 marks
Why is aluminium used for aircraft bodies despite being a reactive metal?
A
Forms a protective Al₂O₃ layer that prevents further corrosion (passivation); also very low density ideal for aircraft
B
Aluminium is less reactive than iron, so it doesn't corrode
C
Aluminium is not used in aircraft — steel is always preferred
D
The surface of aluminium is too smooth for corrosion to occur
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