MCQ
When a corroded metal object is rubbed by a sand paper then:
- AOuter metal surface is removed.
- BMetal becomes thin.
- COuter corroded layer will be removed.
- DAll of the above.
✓
Answer
- Outer corroded layer will be removed.
Explanation:
The metals lose their shine and become dull when exposed to air for a long time. Due to the formation of oxides, when the surface is rubbed by a sand paper, then the outer corroded layer is removed.
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