Understanding Rust and Iron

What is rusting?

• A reduction reaction

• An oxidation reaction

• A neutralisation reaction

• A precipitation reaction

What are the necessary components for rusting to occur?

• Iron and salt

• Iron and water

• Water and oxygen

• Oxygen and salt

What is the word equation for rusting?

• Iron + salt + oxygen → iron chloride

• Iron + water + oxygen → hydrated iron(III) oxide

• Iron + water → iron hydroxide

• Iron + oxygen → iron oxide

What happens to the nail in the experiment when air or water is not present?

• It rusts

• It melts

• It does not rust

• It dissolves

What is the role of boiling water in the rusting experiment?

• It adds oxygen

• It removes oxygen

• It adds water vapour

• It removes water vapour

What does anhydrous calcium chloride do in the experiment?

• Adds water vapour

• Removes water vapour

• Adds oxygen

• Removes oxygen

Does salt dissolved in water cause rusting?

• Yes, it causes rusting

• No, it does not cause rusting

• Yes, it prevents rusting

• No, it slows down rusting

Why does aluminium not rust or corrode?

• It is too hard

• It is protected by a layer of aluminium oxide

• It is always dry

• It is not exposed to air

What effect does acid rain have on rusting?

• It prevents rusting

• It slows down rusting

• It speeds up rusting

• It has no effect on rusting

What happens to the rust on iron and steel objects?

• It strengthens the object

• It flakes off the surface

• It makes the object shiny

• It turns into aluminium oxide