Silver articles lose their lustre and develop a black coating on its surface . Give reasons
Because of the presence of air in the atmosphere,that’s why silver article lose their lustre and develop a black coating on its surface.
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The silver article becomes black after sometimes when exposed to air because silver reacts with sulphur which is present in the atmosphere and then forms silver sulphide. Thus the layer of this silver sulphide is formed on the surface of the silver article so they appear as dull or black.
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