Question

Sits bought a statue of copper. It acquired a dull green coating after a couple of months explain the reason.

Answer 1

The main reason behind this is that when copper is exposed to moisture, it turns green due to corrosion.

The green coating is a mixture of Copper carbonate and copper hydroxide.

The reaction is

2Cu +O2+ CO2+ H2O -------- Cu(OH)2+ CuCO3

This corrodes the copper.

That's why the statue which was bought by Sita acquired a green coating after a couple of months.

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