Why cu vessels becomes green in colour when exposed in air in rainy season
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because of rusting or corrosion
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Copper metal when exposed to air turns green in colour due to corrosion. Thus, when copper vessels are exposed to air in rainy season for sometime, the metal reacts with gases and moisture present in air to form a mixture of copper carbonate and copper hydroxide [(CuCO3). ... This gives a green colour to the vessels.
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