wire and rub it using a sandpaper you can see a bright metallic lustre – InterviewSolution

InterviewSolution

1.	wire and rub it using a sandpaper you can see a bright metallic lustre, within a few days it gets tarnished why does it happen?
Answer» Because of Oxidation it happens Explanation:deposits of MATERIAL in some metals when EXPOSED in AIR causes them to lose their Luster . when we rub it with sand paper this layer sheds and a NEW fresh shiny layer COMES.

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