Lesson 3.1.7
3.1.7 Oxidation, reduction and redox equations Quiz: AQA Chemistry, Unit 1
20 questions
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Lesson 3.1.7, Oxidation, reduction and redox equations: 20 multiple choice questions for the AQA Chemistry (7405), Unit 1: Physical chemistry, written with Revision Ninja.
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The 20 questions
-
Which process is defined as the loss of electrons by a chemical species?
- Protonation
- Reduction
- Neutralisation
- Oxidation
-
Which process is defined as the gain of electrons by a chemical species?
- Electrolysis
- Hydration
- Oxidation
- Reduction
-
What role does an electron acceptor play in a redox reaction?
- Catalyst
- Oxidising agent
- Reducing agent
- Nucleophile
-
What role does an electron donor play in a redox reaction?
- Reducing agent
- Catalyst
- Electrophile
- Oxidising agent
-
What is the oxidation state of chromium in the dichromate ion, Cr2O7^2-?
- +6
- +7
- +3
- +12
-
What is the oxidation state of manganese in the permanganate ion, MnO4^-?
- +2
- +5
- +6
- +7
-
What is the oxidation state of sulfur in the sulfate ion, SO4^2-?
- +4
- +6
- +2
- -2
-
What is the oxidation state of sulfur in hydrogen sulfide, H2S?
- -2
- +2
- +6
- 0
-
What is the oxidation state of chlorine in the chlorate(I) ion, ClO^-?
- +7
- +1
- +5
- -1
-
What is the oxidation state of nitrogen in the ammonium ion, NH4^+?
- +5
- -3
- +3
- -1
-
What is the oxidation state of oxygen in hydrogen peroxide, H2O2?
- +1
- -2
- 0
- -1
-
Which process occurs in the half-equation Fe²⁺ → Fe³⁺ + e⁻?
- Reduction
- Disproportionation
- Neutralisation
- Oxidation
-
Which process occurs in the half-equation MnO₄⁻ + 8H⁺ + 5e⁻ → Mn²⁺ + 4H₂O?
- Disproportionation
- Reduction
- Hydration
- Oxidation
-
Combining MnO4^- + 8H^+ + 5e^- -> Mn^2+ + 4H2O with Fe^2+ -> Fe^3+ + e^- gives an overall equation. How many moles of Fe^2+ react with one mole of MnO4^-?
- 1
- 5
- 4
- 8
-
For the reduction half-equation Cr2O7^2- + 14H^+ + 6e^- -> 2Cr^3+ + 7H2O, how many electrons are transferred per dichromate ion?
- 3
- 14
- 2
- 6
-
In the reaction Zn + Cu²⁺ → Zn²⁺ + Cu, which species is the oxidising agent?
- Cu²⁺
- Zn²⁺
- Cu
- Zn
-
Which type of redox process occurs when chlorine reacts with cold, dilute sodium hydroxide?
- Disproportionation
- Thermal decomposition
- Ligand exchange
- Electrophilic substitution
-
What is the average oxidation state of sulfur in the tetrathionate ion, S₄O₆²⁻?
- +2
- +2.5
- +3
- +2.25
-
Using the 1:5 ratio from the overall redox equation for MnO4^- and Fe^2+, how many moles of MnO4^- are needed to react completely with 0.0200 mol of Fe^2+?
- 0.00400 mol
- 0.0200 mol
- 0.00100 mol
- 0.100 mol
-
Which species is oxidised in the reaction Mg + 2HCl → MgCl₂ + H₂?
- Cl⁻
- H⁺
- Mg
- H₂
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