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Copper substances when exposed to air gains a green coating due...

This question belongs to General Knowledge Chemistry
Chemistry
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Copper substances when exposed to air gains a green coating due to the formation of:

Answer & Solution
Correct Answer: Option B
When copper is exposed to air, it reacts with moist carbon dioxide in the air and slowly loses its shiny brown surface and gains a green coat. This green substance is basic copper carbonate (CuCO3. Cu (OH)2). The formation of this green coating on the surface of a copper object corrodes it.
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