Question

Paheli bought a statue made of copper. To her surprise it acquired a dull green coating after a couple of months. Explain after a couple of months. Explain the reason.​

Answer 1

Answer:

Copper turns green because of chemical reactions with the elements. ... Just as iron that is left unprotected in open air will corrode and form a flaky orange-red outer layer, copper that is exposed to the elements undergoes a series of chemical reactions that give the shiny metal a pale green outer layer called a patina

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Answer 2

Answer:

The coating is of basic copper carbonate ( copper carbonate +copper hydroxide)

Explanation:

when copper is exposed to moist air it aquires a dull green coating of copper carbonate +copper hydroxide.

It is as follows:

2Cu+CO2 +O2 +H20 (water)= CuCO3+Cu(OH)2

Underlined components are moist air.