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.



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