Question

Why is copper vessel covered with a green coating in rainy season?

Answer 1

copper vessel covered with a green coating in rainy season because
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in rainy season the availability of moisture is more which will increase the rate of corrosion of the copper metal 

it is because of corrosion copper develops green coating in its surface

Answer 2

Answer:

copper vessel is covered with green coating in rainy season because the availability of moisture in the air will increase the rate of corrosion