Single correct option
Consider the following statements about rusting of iron:
1. Both air and moisture are needed for rusting.
2. Coating iron with zinc (galvanisation) protects it from rusting.
Which of the statements given above is/are correct?
1. Both air and moisture are needed for rusting.
2. Coating iron with zinc (galvanisation) protects it from rusting.
Which of the statements given above is/are correct?
- A. 1 only
- B. 2 only
- C. Both 1 and 2
- D. Neither 1 nor 2
Show answer and solution
Answer: (C) Both 1 and 2
Rusting is the oxidation of iron in the presence of oxygen and water, forming hydrated iron oxide. Galvanisation coats iron with zinc, which is more reactive and protects the iron even if the layer is scratched (sacrificial protection). Both statements are correct.
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