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