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Question
The corrosion of copper produces a ______ coating of basic copper carbonate on its surface.
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Solution
The corrosion of copper produces a green coating of basic copper carbonate on its surface.
Explanation:
When a copper object is exposed to moist air for a long time, it slowly reacts with oxygen, carbon dioxide, and water vapour. This oxidation process causes the shiny brown metal to corrode, producing a green layer on its surface commonly called a patina. This green substance is basic copper carbonate, which is a chemical mixture of copper hydroxide and copper carbonate [CuCO3 . Cu(OH)2].
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