Question

Paheli bought a statue made of copper.to her surprise it required a dull green coating after a couple of month.explain the reason.

Answer 1

Copper reacts with moist air and forms basic copper carbonate responsible for the green layer.

This phenomenon is corrosion.

Cu + H20 + O2 + CO2 -------> CuCO3.Cu(OH)2.




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- Maheshwaran.