The surface of some metals like iron is corroded, when they are exposed to…
2024
The surface of some metals like iron is corroded, when they are exposed to ______ for a long period of time.
- A.
Moist air
- B.
Dry air and sunlight
- C.
Water
- D.
Water and sunlight
- E.
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Correct answer: A
Corrosion is the gradual deterioration of a metal due to chemical reactions with its environment. Iron rusts when it is exposed to moist air, which contains both oxygen and water vapour.
Rusting of iron can be represented as:
The reddish-brown substance formed is called rust (hydrated iron(III) oxide).
✅ Correct Answer: A) Moist air
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