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Metals are regarded as electropositive e...

Metals are regarded as electropositive elements
(ii) Articles of aluminium do not corrode even though aluminium is an active metal.

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Metals have a tendncy to lose one or more electrons to from positive ions, therefore metals are called electropositive elements.
(ii) Aluminium being a reactive metl readily combines with oxygen to give a protective layer of `Al_(2)O_(3)` As a result further corrosion stops.
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Knowledge Check

  • Aluminium is self protecting metal because of

    A
    never tarnishing nature
    B
    inert nature
    C
    formation of an oxide coating
    D
    formation of a hydroxide coating

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