some metals appear dull?
Asked by | 17th Sep, 2013, 03:30: PM
Metals when exposed to air for a long time develop a thin layer of oxide,carbonate or sulphide by the slow action of the various gases present in air.Due to oxidation, a new layer is formed giving the metals a dull appearance.
Answered by Vaibhav Chavan | 18th Sep, 2013, 08:56: AM
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