Quiz on Rusting of Iron

What are the reactants in the rusting of iron?

• Iron and carbon

• Iron and water

• Iron, oxygen, and water

• Iron, hydrogen, and nitrogen

What is the product of the rusting reaction?

• Iron carbonate

• Hydrated iron oxide

• Iron chloride

• Magnesium oxide

Why is stainless steel used for surgical tools instead of regular steel?

• It is shinier than regular steel

• It is softer than regular steel

• It does not rust

• It is heavier than regular steel

Which of the following statements best describes rusting?

• Rusting is a physical change

• Rusting is a chemical change

• Rusting does not involve oxygen

• Rusting only happens in seawater

How can rusting be prevented?

• By painting or applying grease

• By exposing the metal to air and water

• By heating the metal to high temperatures

• By cooling the metal to low temperatures

Which type of steel is most likely to rust?

• Stainless steel

• Carbon steel

• Chromium steel

• Aluminum steel

Why is the tendency of iron to rust considered a chemical property?

• It does not involve a change in the composition of iron

• Rusting changes iron into a new substance

• Rusting can be reversed easily

• Rusting does not form any new substances

Which of the following is the correct word equation for rusting?

• Iron + carbon + oxygen → iron carbide

• Iron + water → hydrated iron oxide

• Iron + oxygen + water → hydrated iron oxide

• Iron + hydrogen → iron hydroxide

Why does rusting continue once it starts?

• Rust is a strong protective layer

• Rust flakes off, exposing fresh iron to oxygen and water

• Rust prevents oxygen from reacting with iron

• Rust absorbs water and protects the surface

Which of the following best explains why boats made of steel rust faster in seawater?

• Seawater increases the supply of oxygen

• Seawater increases the supply of hydrogen

• Salt in seawater speeds up the rusting process

• Salt in seawater forms a protective layer on steel