some article s made of silver cooper and iron get coloured coating over them when they are exposed to air.Identify the colour and chemical name of the substance of coating in each cases.
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Silver:
Colour of coating=black
Chemical name of coating=silver sulphide
Copper:
Colour of coating=green
Chemical name of coating=basic copper carbonate
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Answer:Silver:
Colour of coating=black
Chemical name of coating=silver sulphide
Copper:
Colour of coating=green
Chemical name of coating=basic copper carbonate
Explanation:
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