Which method most directly prevents iron from coming into contact with air and moisture, thereby protecting it from rusting?
Answer and explanation
Correct answer: Coating iron with paint
Rusting requires contact between iron, oxygen, and water or moisture. Painting iron creates a continuous protective coating that separates the metal surface from air and moisture, so option B is correct. Leaving the metal exposed or placing it in moisture increases contact with the necessary reactants. Scratching can remove protection and expose fresh iron, making corrosion more likely rather than preventing it.
Frequently asked questions
What is the correct answer to this question?
Coating iron with paint
Why is this the correct answer?
Rusting requires contact between iron, oxygen, and water or moisture. Painting iron creates a continuous protective coating that separates the metal surface from air and moisture, so option B is correct. Leaving the metal exposed or placing it in moisture increases contact with the necessary reactants. Scratching can remove protection and expose fresh iron, making corrosion more likely rather than preventing it.
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.
