Silver turned black, copper reacts with co2 and turned green, iron gets rusted. This happenens due to which formation of compound?

Silver turned black, copper reacts with co2 and turned green, iron get

1.	Silver turned black, copper reacts with co2 and turned green, iron gets rusted. This happenens due to which formation of compound?
Answer» END...This is due to the formation of oxide of RESPECTIVE compounds. There is OXIDATION of silver, copper, iron in the PRESENCE of water vapour.HOPE that it will help you