Explain why most of the metal articles become dull when kept exposed t – InterviewSolution

1.	Explain why most of the metal articles become dull when kept exposed to air?
Answer» Metal articles react with the gases present in the air and their surface gets coated with the layer of compound it forms making them look dull and the lustre is lost. For example, aluminium metal reacts readily with oxygen to form aluminium oxide and its surface becomes dull.

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