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
121–130 of 374 · Normal
Question 121
1 mark · Normal
Answer and check →Which equation shows reduction in terms of electron transfer?
- A.A. Cu^{2+} + 2e^- \to Cu
- B.B. Mg \to Mg^{2+} + 2e^-
- C.C. Fe \to Fe^{3+} + 3e^-
- D.D. Cl_2 + 2e^- \to 2Cl^-
Question 122
2 marks · Normal
Answer and see the solution →Complete the sentences about oxidation and reduction in terms of oxygen:
A substance is _______ if it gains oxygen, and it is _______ if it loses oxygen.
Question 123
4 marks · Normal
Answer and see the solution →Potassium chlorate(V) reacts on heating with manganese(IV) oxide catalyst:
(a)[2 marks]Identify which substance is reduced and which is oxidised in this reaction.
(b)[2 marks]Name the oxidising agent in this reaction. Explain your answer.
Question 124
2 marks · Normal
Answer and see the solution →Write the ionic equation for the reaction that occurs when a strip of magnesium is placed into a solution of iron(II) sulfate.
Question 125
4 marks · Normal
Answer and see the solution →Aluminium reacts with a solution of copper(II) nitrate.
(a)[1 mark]State the formula of a spectator ion in this reaction.
(b)[1 mark]Explain what is meant by the term 'spectator ion'.
(c)[2 marks]Identify the spectator ion(s) in the following equation:
Question 126
3 marks · Normal
Answer and see the solution →Silver is displaced from a solution of silver nitrate by magnesium metal. Write balanced ionic half-equations for the oxidation and reduction steps in this reaction.
Question 127
3 marks · Normal
Answer and see the solution →In the reaction below, explain which substance is the oxidising agent and which is the reducing agent. Give your reasoning in terms of electron transfer.
Question 128
4 marks · Normal
Answer and see the solution →The table below shows observations from adding different metals to solutions of salts.
Observations of displacement reactions Metal added Solution Observation Zinc Copper(II) sulfate Brown solid forms; blue solution fades Copper Silver nitrate Grey crystals form; colourless solution turns blue Iron Magnesium sulfate No visible change For each reaction in the table, write the full ionic equation showing the species that change during the reaction. Where no reaction occurs, state why.
Question 129
1 mark · Normal
Answer and check →Which of the following is a spectator ion in the reaction between zinc and copper(II) chloride solution?
- A.Zn^{2+}
- B.Cl^-
- C.Cu^{2+}
- D.Zn(s)
Question 130
2 marks · Normal
Answer and see the solution →Write the ionic half-equation for the reduction that takes place when lead metal is formed from lead(II) ions.