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Metals and Non-Metals
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When a copper vessel is exposed to moist air, a green coating is formed on its surface. What chemical compounds are present in that coating?
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A
Copper hydroxide and copper carbonate
💡 Explanation:
It is the heavy, metallic and hard tin dioxide (SnO2). It is the major ore of tin. It is colourless when pure, but brown or black when iron impurities are present.