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In the atmosphere of industrial smog, copper corrodes to form: This question has multiple correct options

1. Basic copper carbonate
2. Copper sulphide
3. Basic copper sulphate
4. copper oxide

Correct answer: Basic copper carbonate

Solution

In polluted, moist air containing carbon dioxide, copper slowly forms a green protective patina of basic copper carbonate. This is the common corrosion product of copper in atmospheric conditions.

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