Corrosion of copper produces
- copper oxide
- copper carbonate
- copper sulphate
- pure copper
The Correct Option is B
Approach Solution - 1
Corrosion of copper occurs when it is exposed to atmospheric elements, leading to the formation of compounds on the surface. Initially, copper reacts with oxygen and moisture to form copper(I) oxide, which is represented by the chemical equation: 2Cu + O2 → 2CuO. With continuous exposure to carbon dioxide and water in the atmosphere, copper carbonate is formed. The complete reaction can be summarized as follows:
2Cu + CO2 + H2O + O2 → CuCO3 · Cu(OH)2
The final product of copper corrosion when exposed to atmospheric conditions is copper carbonate, also known as patina.
Therefore, the correct answer is: copper carbonate
Approach Solution -2
Correct answer: copper carbonate
Explanation:
When copper is exposed to moist air for a long time, it reacts with carbon dioxide (CO2), oxygen (O2), and water (H2O) to form a greenish layer on its surface. This green layer is a mixture of basic copper carbonate, primarily:
\[ \text{Cu(OH)}_2 \cdot \text{CuCO}_3 \]
This process is called corrosion of copper, and it results in the formation of copper carbonate.
Hence, corrosion of copper produces copper carbonate.
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