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Explain Why, When a Copper Object Remains in Damp Air for a Considerable Time, a Green Coating is Formed on Its Surface. What is this Process Known As? - CBSE Class 10 - Science

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Question

Explain why, when a copper object remains in damp air for a considerable time, a green coating is formed on its surface. What is this process known as?

Solution

Copper object, staying in damp air for a long time, reacts with carbon dioxide and moisture (water) in air slowly to form green layer of basic copper carbonate ( CuCO3. Cu(OH)2)  on the outside area of the object.  This process is known as corrosion. Copper is very low in its reactivity; therefore, corrosion of copper also occurs slowly.

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Solution Explain Why, When a Copper Object Remains in Damp Air for a Considerable Time, a Green Coating is Formed on Its Surface. What is this Process Known As? Concept: Corrosion and Its Prevention.
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