Chemistry · Metals and Non-metals

तांबे के एक बर्तन को लंबे समय तक नम वायु में खुला रखने पर उसकी बाहरी सतह पर एक हल्की हरी परत जम जाती है। यह हरा पदार्थ किसका मिश्रण है?

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