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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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Give reason for the following: a) Metals are regarded as electropositive elements. b) When a piece of copper metal is added to a solution of Zinc sulphate, no change take place, but the blue colour of copper sulphate fades away when a piece of zinc is placed in its solution . c) Articles of aluminium do not corrode even though alluminium is an active metal.

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