How does applying oil to iron reduce rusting?
Answer and explanation
Correct answer: The oil layer prevents iron from contacting air and moisture.
Rusting requires iron to be in contact with oxygen and water/moisture. A layer of oil forms a protective barrier on the iron surface and prevents air and moisture from reaching it, so rusting is reduced. In contrast, option B suggests increasing reaction with water, which would not reduce rusting.
Frequently asked questions
What is the correct answer to this question?
The oil layer prevents iron from contacting air and moisture.
Why is this the correct answer?
Rusting requires iron to be in contact with oxygen and water/moisture. A layer of oil forms a protective barrier on the iron surface and prevents air and moisture from reaching it, so rusting is reduced. In contrast, option B suggests increasing reaction with water, which would not reduce rusting.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
