some articles made of silver, copper and iron get coloured coating over them when they are exposed to air .identify the colour and chemical name of the substance of coating in each case.
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Silver --◆ black coating.
Silver sulphide.
Copper --◆ green coating.
Copper oxide.
Iron --◆ reddish Brown.
Ferric oxide.
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Answered by
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Answer:1. Silver: black coating: Silver sulfide.
2.Copper: green coating: Copper oxide
3. Iron :reddish Brown: Ferric oxide.
Explanation:
Corrosion is the process of slow eating away of metal due to attack of atmospheric gases on the surface of metal resulting into formation of compounds such as oxides, sulfides , carbonates etc is called as corrosion.
1. Corrosion of silver:
2. Corrosion of copper:
3. Corrosion of iron is called as rusting. Rust is hydrated ferric oxide .
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