Silver ornaments get blackened when exposed to air for a long time. Why?
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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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Answer:
because air contains water vapours which includes oxygen and hydrogen that when reacts with silver chemical reaction takes place and it turns blackened
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