CBSE BOARD X, asked by anuchauhan292, 1 year ago

Why surface of some metals becomes dull after some time?

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Answered by amisharaj
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Answered by Anonymous
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It is because they react with various gases present in the air like oxygen and carbon dioxide to form metal oxide and metal carbonate. The surface of some metal accuquire a dull appearance when exposed to air because they corrode.

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