If copper is kept open in air it slowly loses its shining brown surface brown surface and gains a green coating. It is due to the formation of?
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Answer:Copper carbonate
Explanation:
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When we keep copper in open air a green layer covers the shining brown surface of the copper because -
• There is plenty amount of carbon dioxide gas present in our atmosphere which reacts with the external copper surface.
• In this chemical reaction,a green coloured chemical substance is produced which is also known as the copper carbonate.
• The production of this copper carbonate turns the shining brown copper into pale green.
Chemical reaction :
2 Cu + 3 CO2 = 2CuCO3 (green)
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