explain why the surface of some metals acquires a dull appearance when exposed to air form a long time
Answers
Answered by
0
beause they react with some gases like oxygen , carbon dioxide , etc. and forms an coating on its surface . foe ex- the statue of Liberty was in brown colour at the time it was gifted by the France to the USA . it become blue after some time
Answered by
1
metals get exposed to air and react.iron gets rusted to form iron oxide.silver or copper objects react with sulphide.
Similar questions