When a vessel is exposed to moist air for a long time, then a green co

1.	When a vessel is exposed to moist air for a long time, then a green coating is formed on its surface. The vessel must be made of: A. zinc B. magnesium C. iron D. copper
Answer» D. copper Copper corrodes by oxidation in which it reacts with oxygen in the air to form copper oxide. Copper oxide then combines with carbon dioxide to make copper carbonate, which gives it a green colour. This process is called corrosion of copper.

When a vessel is exposed to moist air for a long time, then a green coating is formed on its surface. The vessel must be made of: A. zinc B. magnesium C. iron D. copper

Answer»

D. copper

Copper corrodes by oxidation in which it reacts with oxygen in the air to form copper oxide. Copper oxide then combines with carbon dioxide to make copper carbonate, which gives it a green colour. This process is called corrosion of copper.

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When a vessel is exposed to moist air for a long time, then a green coating is formed on its surface. The vessel must be made of: A. zinc B. magnesium C. iron D. copper

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