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CBSE Class 10 Answered

COMPOUND
Asked by | 27 May, 2008, 06:06: PM
Expert Answer

Copper hardly reacts with oxygen at all. It does react quite slowly with carbon dioxide and water and oxygen to form a green tarnish (basic copper carbonate), more quickly with salt spray and acid to form a different green tarnish (basic copper chloride) or very quickly with sulfur-containing gases to form a black tarnish (copper sulfide).

Answered by | 28 May, 2008, 10:13: AM
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