CBSE Class 8 Answered
Explain corrosion
Asked by dipanshuashokagarwal | 10 Jul, 2019, 05:45: PM
Expert Answer
- When the surface of a metal is attacked by air, moisture or any other substance around it, the metal is said to corrode and the phenomenon is known as corrosion.
- Copper forms a green deposit on its surface when exposed to moist air. This green substance is copper carbonate.
- Silver gets tarnished when exposed to the atmosphere and forms a black coating of silver sulphide.
- Iron reacts with moist air to acquire a coating of brown flaky substance called rust which is hydrated iron (III) oxide (Fe2O3.xH2O).
Answered by Sheetal Kolte | 11 Jul, 2019, 11:27: AM
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