Chemistry
Grade-10
Easy
Question
What does not prevent rusting?
- Painting and Oiling
- Soaping
- Galvanizing
- Sacrificial protection
Hint:
Soaping will not prevent rusting as it absorbs more moisture.
The correct answer is: Soaping
- When iron metal is exposed to air for long time, it oxidizes and forms a reddish brown color iron oxide on its surface. Rusting occurs due to the presence of moisture.
- Painting and oiling reduces the risk of reaction of iron with moisture as they act as protective layer.
- Galvanizing is the zinc coating over a steel or iron.
- Soaping will not prevent rusting as it absorbs more moisture and will accelerate rusting.
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