This question is about the corrosion of iron. 

State the name of the process that causes iron to corrode. 

A group of students are discussing the conditions required for an iron nail to rust. 

Student 1 says that all iron nails will rust eventually if left in air.

Student 2 says iron needs both oxygen and water to rust.

Student 3 says that iron only needs to be wet to rust.

Plan an investigation to test the predictions of the students.

Use the equipment and materials from the list below:

• test tubes
• stoppers
• iron nails
• boiled water
• drying agent
• oil

State the purpose of the drying agent in test tube 1.

The table below shows the students' results.

Use the results in the table to explain which students' prediction was correct.

This question is about the corrosion of metals and metal alloys.

Saucepans are made from stainless steel.

Give two reasons why saucepans are made of stainless steel rather than iron.

Iron rusts when exposed to both air and water. 

Write a word equation for the rusting of iron to form hydrated iron oxide.

Explain why covering iron with paint or grease prevents the iron from rusting.

Iron is sometimes covered with zinc to prevent it rusting.

Explain how the zinc covering prevents the iron from rusting.

This question is about the corrosion of metals. 

Iron reacts with oxygen in the air and water when it rusts. 

Complete the balanced chemical equation below for the rusting of iron.

Which of the following would not prevent an iron nail rusting?

Which of the following metals could be used to galvanise iron?

Which type of reaction takes place when iron rusts?