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A green deposits is found on copper substances if it is exposed to moist air for long time. Why?​

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Answer:

The green coating on a copper VESSEL when it is EXPOSED to moist air for a LONG TIME consists of

Just as iron that is left unprotected in open air will corrode and form a flaky orange-red outer layer, copper that is exposed to the elements undergoes a series of chemical REACTIONS that give the shiny metal a pale green outer layer called a patina



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