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
11–20 of 26 · Hard
Question 11
2 marks · Hard
Answer and see the solution →Iron reacts with steam to form a black solid and hydrogen gas. State the name and chemical formula of the black solid formed.
Question 12
2 marks · Hard
Answer and see the solution →A student places strips of magnesium and iron into separate test tubes containing excess dilute hydrochloric acid at room temperature. Only one test tube becomes noticeably warm and gives off gas rapidly.
State which metal is more reactive and explain your reasoning using the observations.
Question 13
5 marks · Hard
Answer and see the solution →A student investigates how sodium, magnesium, zinc, and silver react with dilute hydrochloric acid. She records her results in the table below:
Experimental results for reactions with dilute hydrochloric acid. Metal Observation Sodium Rapid fizzing, heat produced, gas collected, test tube very hot. Magnesium Vigorous fizzing, solution gets warm, gas collected. Zinc Steady fizzing, slight warmth, some gas collected. Silver No visible change. (a)[1 mark]Rank the four metals in order of reactivity with dilute hydrochloric acid, starting with the most reactive.
(b)[2 marks]Explain how the student’s observations support the order of reactivity you have given. Refer to at least two different metals in your explanation.
(c)[2 marks]State one reason why it is important to use the same number of moles of each metal when comparing their reactivity in this experiment.
Question 14
2 marks · Hard
Answer and see the solution →A student reacts equal moles of aluminium and iron separately with excess dilute hydrochloric acid at room temperature. The aluminium sample shows little to no fizzing at first but then reacts quickly when warmed. The iron sample reacts slowly, producing gentle fizzing throughout.
Use the observations to explain which metal is more reactive with dilute hydrochloric acid, and give a reason for aluminium’s unusual reaction pattern.
Question 15
2 marks · Hard
Answer and see the solution →Thallium (Tl) is a metal that is just below lead in the reactivity series. Predict whether thallium will react with dilute hydrochloric acid at room temperature. Explain your reasoning.
Question 16
5 marks · Hard
Answer and see the solution →A new metal, X, is known to react slowly with dilute sulfuric acid at room temperature, but shows no reaction with cold water. X is placed between magnesium and iron in the reactivity series.
(a)[2 marks]Predict whether metal X will react with steam. Explain your answer.
(b)[3 marks]X is added to a solution of copper(II) sulfate. Predict what will happen. Write a chemical equation for any reaction.
Question 17
2 marks · Hard
Answer and see the solution →Palladium (Pd) is found in the reactivity series between copper and hydrogen. Predict whether palladium will react with dilute sulfuric acid. Give a reason for your answer.
Question 18
2 marks · Hard
Answer and see the solution →State the two conditions necessary for iron to rust. Explain why covering iron with zinc prevents rusting, even if the zinc layer is scratched.
Question 19
5 marks · Hard
Answer and see the solution →The diagram shows an iron pipe exposed outdoors. The owner wants to protect it from rusting using galvanising.
(a)[2 marks]Describe the process of galvanising as a method of preventing rusting.
(b)[2 marks]Explain why the pipe does not rust even if the zinc coating is damaged in places.
(c)[1 mark]State one other method, apart from galvanising, that could be used to prevent the pipe from rusting, and explain how it works.
Question 20
2 marks · Hard
Answer and see the solution →A steel beam is coated with zinc to prevent rusting. Explain why salty water increases the rate of rusting if the zinc coating is damaged.