Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Inorganic Chemistry
869 practice questions
Topics covered
- The Alkali Metals85 practice questions
- The Halogens86 practice questions
- Gases in the Atmosphere86 practice questions
- Reactivity Series163 practice questions
- Extraction and Uses of Metals128 practice questions
- Acids, Alkalis and Titrations83 practice questions
- Acids, Bases and Salt Preparations156 practice questions
- Chemical Tests68 practice questions
Practice questions
51–60 of 136 · Hard
Question 51
2 marks · Hard
Answer and see the solution →When iron metal is placed in a solution of copper(II) sulfate, a reaction occurs in which copper metal forms. Write the balanced ionic equation for this displacement reaction.
Question 52
5 marks · Hard
Answer and see the solution →A piece of magnesium is placed in a solution of nickel(II) chloride. Magnesium displaces nickel from the solution.
(a)[1 mark]Identify the spectator ion present in this reaction.
(b)[2 marks]Explain what is meant by a spectator ion in a displacement reaction.
(c)[1 mark]State, in terms of electron transfer, which ion acts as the oxidising agent in this reaction.
(d)[1 mark]State, with a reason, which atom or ion acts as the reducing agent.
Question 53
2 marks · Hard
Answer and see the solution →When zinc metal reacts with iron(II) sulfate solution, write the ionic half-equation for the reduction step in this displacement reaction.
Question 54
5 marks · Hard
Answer and see the solution →The table shows a list of four metals. Each can be added to a beaker of cold water. For each metal, describe what you would observe, and name the gas produced.
(a)[2 marks]Potassium is added to cold water.
(b)[1 mark]Sodium is added to cold water.
(c)[1 mark]Calcium granules are added to cold water.
(d)[1 mark]Lithium is added to cold water.
Question 55
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 56
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 57
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 58
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 59
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 60
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.