Lesson 3.1.2
3.1.2 Oxidation, reduction and electron transfer Quiz: Pearson Edexcel Chemistry, Unit 3
20 questions
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Lesson 3.1.2, Oxidation, reduction and electron transfer: 20 multiple choice questions for the Pearson Edexcel Chemistry (9CH0), Unit 3: Redox I, written with Revision Ninja.
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The 20 questions
-
What happens to an oxidising agent during a redox reaction?
- Loses electrons
- Gains protons
- Gains electrons
- Loses protons
-
What happens to a reducing agent during a redox reaction?
- Loses protons
- Gains electrons
- Gains protons
- Loses electrons
-
Which species is oxidised in the reaction 2Mg + O2 -> 2MgO?
- Oxide ion
- Magnesium
- Oxygen
- Magnesium oxide
-
In the reaction 2Na + Cl2 -> 2NaCl, what is the oxidation number change of chlorine?
- +1 to -1
- -1 to 0
- 0 to +1
- 0 to -1
-
Which species acts as the oxidising agent in 2Fe2+ + Cl2 -> 2Fe3+ + 2Cl-?
- Chlorine, Cl2
- Chloride ion, Cl-
- Iron(II) ion, Fe2+
- Iron(III) ion, Fe3+
-
In the reaction between chlorine and bromide ions, which species is oxidised?
- Chlorine
- Bromine
- Chloride ion
- Bromide ion
-
What is the oxidation number of sulfur in H2S?
- 0
- +2
- -2
- +6
-
In the reaction Cu + 2Ag+ -> Cu2+ + 2Ag, what is the reducing agent?
- Copper(II) ion, Cu2+
- Copper, Cu
- Silver ion, Ag+
- Silver, Ag
-
Which equation shows oxidation of iron?
- Fe -> Fe2+ + 2e-
- Fe2+ -> Fe3+ + e-
- Fe3+ + e- -> Fe2+
- Fe3+ + 3e- -> Fe
-
Which species is reduced when permanganate is used in acidic solution?
- Fe2+ to Fe3+
- MnO4- to Mn2+
- H2O to O2
- Mn2+ to MnO4-
-
In any balanced redox reaction, how do electrons lost compare to electrons gained?
- More are lost
- More are gained
- They are equal
- They vary randomly
-
What process must always accompany an oxidation reaction in a chemical system?
- Hydration
- Thermal decomposition
- Reduction
- Neutralisation
-
In the reaction 2H+ + Mg -> Mg2+ + H2, what is the oxidation number change of hydrogen?
- +1 to 0
- +1 to -1
- 0 to -1
- 0 to +1
-
Which species is oxidised in the reaction between iodide and chlorine?
- Iodide ion, I-
- Chlorine, Cl2
- Chloride ion, Cl-
- Iodine, I2
-
In the reaction between zinc metal and copper(II) sulfate solution, what happens to zinc?
- It is reduced
- It is precipitated
- It is oxidised
- It is hydrolysed
-
What property is characteristic of a strong oxidising agent?
- Easily oxidised
- Gains protons easily
- Loses electrons readily
- Easily reduced
-
When Fe2+ is converted into Fe3+, what electron transfer has occurred?
- Loss of 2 electrons
- Gain of 1 electron
- Loss of 1 electron
- Gain of 2 electrons
-
Which species is acting as the reducing agent in 2Br- + Cl2 -> Br2 + 2Cl-?
- Bromine, Br2
- Chlorine, Cl2
- Bromide ion, Br-
- Chloride ion, Cl-
-
What effect does the loss of electrons have on an element's oxidation number?
- Makes it negative
- Increases it
- Decreases it
- No effect
-
In the reaction H2 + Cl2 -> 2HCl, how does the oxidation number of hydrogen change?
- +1 to 0
- -1 to 0
- 0 to +1
- 0 to -1
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