Lesson 4.4.1.4
4.4.1.4 Oxidation and reduction in terms of electrons (HT only) Quiz: AQA Chemistry, Unit 4
20 questions
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Lesson 4.4.1.4, Oxidation and reduction in terms of electrons (HT only): 20 multiple choice questions for the AQA GCSE Chemistry (8462), Unit 4: Chemical changes, written with Revision Ninja.
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The 20 questions
-
In terms of electrons, what is oxidation?
- Loss of neutrons
- Gain of electrons
- Loss of electrons
- Gain of protons
-
In terms of electrons, what is reduction?
- Loss of electrons
- Gain of neutrons
- Gain of electrons
- Loss of oxygen
-
Zn + Cu2+ -> Zn2+ + Cu. Which species is oxidised?
- Zinc
- Copper ions
- Zinc ions
- Copper
-
What is the correct ionic equation for zinc displacing copper from copper sulfate solution?
- Zn + Cu -> Zn2+ + Cu2+
- Zn + SO42- -> ZnSO4
- Zn2+ + Cu -> Zn + Cu2+
- Zn + Cu2+ -> Zn2+ + Cu
-
Mg + 2H+ -> Mg2+ + H2. Which species is reduced?
- Magnesium
- Hydrogen gas
- Magnesium ions
- Hydrogen ions
-
Fe2+ -> Fe3+ + e-. What happens to the iron?
- It is reduced
- It is oxidised
- It is unchanged
- It is hydrolysed
-
Cu2+ + 2e- -> Cu. What happens to the copper ions?
- They are oxidised
- Neither
- They are reduced
- Both
-
In the half equation Al -> Al3+ + 3e-, what process happens to the aluminium?
- Reduced
- Oxidised
- Displaced
- Neutralised
-
In the reaction Mg + Cu2+ -> Mg2+ + Cu, which species gains electrons?
- Copper ions
- Magnesium atoms
- Magnesium ions
- Copper atoms
-
In Fe + Cu2+ -> Fe2+ + Cu, which species is oxidised?
- Copper
- Iron ions
- Copper ions
- Iron
-
What is the correct ionic equation for magnesium displacing zinc ions from solution?
- Mg2+ + Mg -> Zn + Zn2+
- Mg2+ + Zn -> Mg + Zn2+
- Mg + Zn -> Mg2+ + Zn2+
- Mg + Zn2+ -> Mg2+ + Zn
-
Cl2 + 2e- -> 2Cl-. Which species is reduced?
- Chloride ions
- Neither
- Electrons
- Chlorine
-
In 2Na + Cl2 -> 2NaCl, which species is oxidised in electron terms?
- Sodium chloride
- Chlorine
- Sodium
- Neither
-
Why are metal displacement reactions classified as redox reactions?
- Neutrons are transferred
- No particles are moved
- Electrons are transferred
- Protons are transferred
-
Which is a correctly balanced half-equation for oxidation of Fe2+?
- Fe2+ -> Fe3+ + e-
- Fe2+ + e- -> Fe3+
- Fe2+ -> Fe + e-
- Fe2+ + 2e- -> Fe
-
Zn -> Zn2+ + 2e- and Cu2+ + 2e- -> Cu occur together. Which species is reduced?
- Copper metal atoms
- Copper(II) ions
- Zinc metal atoms
- Zinc(II) ions
-
What does reduction mean in terms of electrons?
- Gain of protons
- Gain of electrons
- Loss of electrons
- Loss of protons
-
What happens during a displacement reaction in terms of electrons?
- Neutron loss
- Proton transfer
- Electron sharing
- Electron transfer
-
A species gains three electrons. What process is this?
- Hydrolysis
- Neutralisation
- Oxidation
- Reduction
-
In terms of electrons, what happens when a calcium atom forms a calcium ion?
- Loss of protons
- Loss of electrons
- Gain of electrons
- Gain of protons
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