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 Pending Moderation

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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