One iron nail is kept in a dry, airtight bottle and another nail is kept in moist open air. Which nail will rust faster?
Answer and explanation
Correct answer: Nail kept in moist open air
Rusting of iron requires both oxygen and water (moisture). A nail in moist open air has a continuous supply of oxygen from air and water from moisture, so it rusts faster. In a dry, airtight bottle, moisture is absent and the oxygen supply is limited; therefore, rusting is very slow or does not occur.
Frequently asked questions
What is the correct answer to this question?
Nail kept in moist open air
Why is this the correct answer?
Rusting of iron requires both oxygen and water (moisture). A nail in moist open air has a continuous supply of oxygen from air and water from moisture, so it rusts faster. In a dry, airtight bottle, moisture is absent and the oxygen supply is limited; therefore, rusting is very slow or does not occur.
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.
