Chemistry · Metals and Non-metals
What change is observed when copper metal reacts over a long period with moist air containing oxygen and carbon dioxide?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1It forms a black powdery coating.
- 2It burns with a bright white flame.
- 3It forms a greenish layer.✓
- 4It forms a blue layer.
Correct answer
It forms a greenish layer.
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