Aastha has been collecting silver coins and copper coins one day she observed a black coating on Silver coins and green coating on copper coins which chemical phenomenon is responsible for this coatings write the chemical name of black and green coating
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I think electro platting....
may be right or wrong
may be right or wrong
sohamdatt:
wrong
ohh
sry
then wt may be
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the reason for the black colour of silver coins is due to reaction of sulphur and oxygen
i think that too
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