Give reasons for the following: (i) Metals are regarded as electro-positive elements. (ii) When a piece of copper metal is added to a solution of zinc sulphate, no change takes place, but the blue colour of copper sulphate fades away when a piece of zinc is placed in its solution. (iii) Articles made of aluminium do not corrode even though aluminium is an active metal.

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Answers

2016-02-11T22:44:13+05:30
Metals have a tendency to donate electrons and become a stable positive ion hence they are electro positive .
3 articles made of aluminium don't corrode because of annodising
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