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
291–300 of 869
Question 291
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 292
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 293
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 294
2 marks · Hard
Answer and see the solution →In the reaction below, identify the oxidising agent and the reducing agent: State each answer as a chemical formula.
Question 295
5 marks · Hard
Answer and see the solution →The following ionic equation represents a reaction between zinc metal and copper(II) ions:
(a)[2 marks]State which species is oxidised and which is reduced. Give your answers as chemical symbols or formulae.
(b)[1 mark]Write a half-equation for the oxidation process.
(c)[2 marks]Explain, in terms of electron transfer, why zinc is considered a reducing agent in this reaction.
Question 296
2 marks · Hard
Answer and see the solution →Describe what is meant by 'oxidation' and 'reduction', in terms of oxygen transfer.
Question 297
1 mark · Easy
Answer and see the solution →State the ionic equation for the reaction of magnesium with copper(II) sulfate solution.
Question 298
3 marks · Easy
Answer and see the solution →Nickel metal is added to a solution of iron(II) nitrate.
(a)[1 mark]State the formula of a spectator ion in this reaction.
(b)[2 marks]Explain what is meant by a spectator ion in a displacement reaction.
Question 299
2 marks · Easy
Answer and see the solution →Write the ionic half-equation for the oxidation step, showing iron metal reacting to form iron(II) ions in a displacement reaction.
Question 300
2 marks · Easy
Answer and see the solution →In the reaction:
State which substance acts as the oxidising agent and which acts as the reducing agent. Explain your answer in terms of electron transfer.