English, asked by parthmansukhani23122, 4 months ago

why does most of the metal objects become pale when kept in open air?

Answers

Answered by dhrubayanpal7a32020

Explanation:

The surface of some metals acquires a dull appearance when exposed to air for a long time because metals from a thin layer of oxides, carbonates or sulphide on their surface by the slow action of various gases present in the air that make the dull appearance.

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