Question

When Pamela exposed her copper vessel to moist air for a long time, she noticed a greenish deposit on the surface of the vessel. Give reason.

plz answer fast

Answer 1

Answer:

It's because on moist atmospheric air itself Copper gets oxidised and due to oxidation alone it gets changed its colour from Brown to Green

Explanation:

Additional fact:-

The statue of Liberty which is at United states ,was well actually build up on with complete copper metal and it was there at brown color itself. But due to atmospheric moisture itself , it's got changes it's colour to green and hence now it's resembling it in green colour.

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Answer 2

Answer:

Explanation:

The copper metal reacts with oxygen, resulting in the formation of an outer layer of copper oxide, which appears green or bluish-green in color. This layer is known as the patina.

The reaction is written below -

2Cu + O2 = 2CuO

(copper) + (oxygen) = (copper oxide)