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Paheli bought...

Question

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

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Solution

Dear Student

The statue of copper reacted with moisture and carbon dioxide present in the atmosphere got corrode and thus forming a dull layer of copper carbonate and copper hydroxide.

$C u + H_{2} O + C O_{2} \to C u C O_{3} + C u (O H)_{2}$

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