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If you collect silver coins and copper c...

If you collect silver coins and copper coins, after some days a black coating on silver coins and a green coating on copper coins appear. Which chemical phenomenon is responsible for these coatings? Write the chemical name of these black and green coatings.

Text Solution

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Corrosion is responsible for this coating on the coins. Black coating is due to the formation of `Ag_2S` and Green coating is due to the formation of `CuCO_3.Cu(OH)_2`
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