1. Riya Kumari
  2. Chemical Reactions And Equations
  3. Thursday, July 07 2016, 08:43 PM

Explain why the surfaces of some metal acquire dull appearance when exposed to air for a long time. 

Shantanu Kumar Accepted Answer

Some metals get affected by oxygen and moisture present in the air even at room temperature.So, when those metals are exposed to air for a long time they usually get corroded and give a dull experience.

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