Paheli bought a statue made of copper. To her surprise it acquired
a dull green coating after a couple of months. Explain the reason
NCERT Class VIII
Science - Exemplar Problems
Chapter 4. Materials: Metals and Non-Metals
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- The statue made of copper will get a dull green coating after a couple of months due to the oxidation of copper and other chemical reactions.
- When exposed to air and under moisture, copper reacts with water and oxygen.
- The copper first oxidizes to copper oxide and then undergoes further changes to finally form hydrated copper carbonate which is in green colour. This green colour layer is called as the patina.
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