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List in tabular form any three chemical ...

List in tabular form any three chemical on the basis of which metals and non-metals are differentiated.
State two ways to prevent the rusting of iron.

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(b) Corrosion/rusting of metals can be prevented by the following methods ,
(i) by painting, oiling and greasing .
(ii) By galvanising which is the process of coating of iron objects with zinc metal.
(iii) It can also be prevented by chrome plating , anodising or making alloys.
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