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STD 11 -p-Block elements - I — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 11 -p-Block elements - I4 Marks
MCQ
Aluminium is a self-preserving metal, because
  • A
    It is not tarnished by air
  • B
    A thin film of basic carbonate on its surface
  • ✓
    A non-porous layer of oxide is formed on its surface
  • D
    It is not affected by salt water
✓

Answer

Correct option: C.
A non-porous layer of oxide is formed on its surface
c
Aluminum is called self-protecting metal because when it comes in contact with the atmosphere it is covered entirely with a layer of aluminum oxide which stops further corrosion.

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