Question
Give examples of corrosion.
✓
Answer
- Examples of corrosion are as follows :
- Silver articles become black after some time when exposed to air.
- This is because it reacts with sulphur in the air to form a coating silver sulphide.
- Copper reacts with moist carbon dioxide in the air and slowly loses its shiny brown surface and gains a green coat.
- This green substance is basic copper carbonate.
- Iron when exposed to moist air for a long time acquires a coating of brown flaky substance called rust.
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