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Question

If copper is kept open in air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of:


A
CuSO4
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B
CuCO3
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C
Cu(NO3)2
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D
CuO
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Solution

The correct option is B $$CuCO_{3}$$
The green coat is due to the basic copper carbonate formation and is a mixture of copper carbonate and copper hydroxide $$(CuCO_3$$ and $$Cu(OH)_2)$$.

Chemistry

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