CAIE IGCSE Chemistry 9.5 Corrosion of Metals Topic Practice

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Question 1

[Maximum number: 1]

The diagrams show experiments to investigate rusting of iron nails.

Figure for Question 1 — CAIE IGCSE Chemistry

In which test-tubes do the nails rust?

A

1, 2 and 3

B

1 and 2 only

C

1 and 3 only

D

1 only

Question 2

[Maximum number: 1]

Iron rusts in the presence of oxygen and water.
Which statements about the rusting of iron are correct?

1 Anhydrous iron(II) oxide is produced when iron rusts.
2 Iron rusts more quickly when attached to a piece of zinc.
3 Coating the iron with plastic prevents the iron from rusting.
4 Iron loses electrons when it rusts.

A

1 and 2

B

1 and 4

C

2 and 3

D

3 and 4

Question 3

[Maximum number: 1]

Which compound is formed when iron rusts?

A

anhydrous iron(II) oxide

B

anhydrous iron(III) oxide

C

hydrated iron(III) hydroxide

D

hydrated iron(III) oxide

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