Question

When a vessel is exposed to moist air, it forms green coating on the surface. The

vessel must be made of

a) zinc b) copper c) magnesium d) iron​

Answer 1

copper

When a copper vessel is exposed to moist air for a long time it develops agreen layer on its surface. 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.

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Answer 2

Answer:

Copper

Step-by-step explanation:

When copper is exposed to the atmosphere it will react with carbon dioxide forming copper carbonate which is green in color.