Science, asked by vivekGurjar, 11 months ago

A boy has been collecting silver coins and copper coins one day he observed a black coating on Silver coin and a green coating on copper coin which chemical phenomenon is responsible for this coating

Answers

Answered by ardmind

1

Answer:

due to atmospheric moisture after some years or month it ouccr in nature it also happen in iron it turns brownish in colour

Answered by ranjanalok961

3

Explanation:

The phenomena responsible for the formation of a coating on copper and silver objects is known as corrosion.

black coating on Silver coin Due to react with Sulphur, formed silver sulphide (Ag2S).

green coating on copper coin Due to formation of cooper corbonate.

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