Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Chapter
Reactivity Series
163 practice questions
Topics covered
- Displacement reactions involving metal oxides20 practice questions
- Oxidation and reduction19 practice questions
- Displacement reactions involving solutions of salts19 practice questions
- Reactions of metals with water18 practice questions
- Reactions of metals with dilute acids19 practice questions
- Making predictions using the reactivity series19 practice questions
- Preventing rusting by galvanising21 practice questions
- Preventing rusting by using sacrificial protection18 practice questions
Practice questions
51–60 of 66 · Easy
Question 51
2 marks · Easy
Answer and see the solution →Explain why galvanising is able to protect iron from rusting even when the zinc coating is scratched.
Question 52
3 marks · Easy
Answer and see the solution →The table below shows the results of an experiment. Three identical iron nails were placed under different conditions for 10 days to investigate rusting.
Rusting of iron nails under different conditions. Test tube Conditions Rust formed after 10 days? 1 Air only No 2 Water only (boiled, air excluded) No 3 Air and water Yes (a)[1 mark]Which test tube shows the conditions needed for rusting?
(b)[2 marks]Explain why no rust formed in test tube 2.
Question 53
1 mark · Easy
Answer and see the solution →State one reason why coating iron with oil or grease helps prevent rusting.
Question 54
3 marks · Easy
Answer and see the solution →An iron bridge over a river is being considered for galvanising to prevent rusting.
(a)[1 mark]Describe the process of galvanising.
(b)[2 marks]State how galvanising protects the iron bridge from rusting.
Question 55
2 marks · Easy
Answer and see the solution →A steel railing has a surface area of 400 cm² and is to be protected from rusting by covering it with a thin layer of zinc (galvanising). If 0.15 g of zinc is needed to cover 100 cm², calculate the minimum mass of zinc needed to fully galvanise the railing. Give your answer to 2 decimal places.
Question 56
2 marks · Easy
Answer and see the solution →A metal sheet weighing 1.2 kg is coated by galvanising to prevent rusting. The layer of zinc adds 0.006 kg to its mass. Calculate the percentage increase in mass of the sheet after galvanising. Give your answer as a percentage to two decimal places.
Question 57
1 mark · Easy
Answer and see the solution →State one example of a structure that is protected from rusting using sacrificial anodes.
Question 58
3 marks · Easy
Answer and see the solution →Iron pipes used in water supply networks are often fitted with zinc blocks to prevent rusting.
(a)[1 mark]Describe what happens to the zinc block over time.
(b)[2 marks]Explain how the zinc block prevents the iron pipe from rusting.
Question 59
2 marks · Easy
Answer and see the solution →A large storage tank for water is made of steel and is buried underground. Magnesium blocks are attached to its surface.
Explain why magnesium is a suitable choice to protect the tank and suggest one other metal that could be used for this purpose.
Question 60
3 marks · Easy
Answer and see the solution →The table shows how the mass of a zinc sacrificial anode attached to an iron structure changes over four years.
Year Mass of zinc anode (g) 0 500 1 425 2 355 3 295 4 240 (a)[1 mark]State the decrease in mass of the zinc anode during the second year (from year 1 to year 2).
(b)[1 mark]Explain why the zinc anode loses mass over time.
(c)[1 mark]Describe how this process protects the iron structure from rusting.