SCIENCE
Mathematics
Q.20 Single Choice
The chemical composition of the dull green coating
acquired by copper vessels when exposed to moist
air is
CuCO3
Cu(OH)2
Cu(OH)2 + CuCO3
CuO + CuCO3
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CuCo3
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Answer:
When copper vessel is exposed to air turns green in colour due to corrosion. It is so because the metal reacts with moisture and atmospheric gases to form a mixture of copper carbonate and copper hydroxide, which gives a green colour to the surface of copper vessel.
Explanation:
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