Rusting of iron takes place due to
1). oxidation
2). carbonation
3). exfoliation
4). corrosion
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1. The acid rain destroys vegetations because it contains
2. Aspirin is
3. Which of the following is used in welding broken pieces of iron rails and machine parts?
4. In which of the following states maximum iron ore is found ?
5. Question 7.11:Explain why NH3 is basic while BiH3 is only feebly basic.
6. The most abundant constituent of atmospheric air is
7. Which of the following is used in dating archaeological findings ?
8. The constituents of automobile exhaust that can cause cancer is/are :