Lesson 3.1.1
3.1.1 Oxidation numbers Quiz: Pearson Edexcel Chemistry, Unit 3
20 questions
In partnership with Revision Ninja
Lesson 3.1.1, Oxidation numbers: 20 multiple choice questions for the Pearson Edexcel Chemistry (9CH0), Unit 3: Redox I, written with Revision Ninja.
Host it live on the board and students join with a game code on their own devices, or revise alone with Free Play. The answers are revealed in the game.
The 20 questions
-
What is the oxidation number of oxygen in water, H2O?
- +2
- -1
- -2
- 0
-
What is the oxidation number of sulfur in the sulfate ion, SO4 2-?
- -2
- +4
- +6
- +8
-
What is the oxidation number of oxygen in hydrogen peroxide, H2O2?
- +1
- 0
- -2
- -1
-
What is the oxidation number of chromium in the dichromate ion, Cr2O7 2-?
- +7
- +12
- +3
- +6
-
What is the oxidation number of manganese in the permanganate ion, MnO4-?
- +4
- +8
- +7
- +6
-
What is the oxidation number of hydrogen in the metal hydride NaH?
- -1
- +1
- 0
- -2
-
In which species does nitrogen have an oxidation number of -3?
- NO2
- NH4+
- N2O
- NO3-
-
Which equation shows a reduction of an element?
- Fe2+ -> Fe3+ + e-
- 2I- -> I2 + 2e-
- Cl2 + 2e- -> 2Cl-
- Zn -> Zn2+ + 2e-
-
How is oxidation defined in terms of electron transfer?
- Loss of neutrons
- Loss of electrons
- Gain of electrons
- Gain of protons
-
In the reaction Zn + Cu2+ -> Zn2+ + Cu, which species is the reducing agent?
- Copper(II) ion, Cu2+
- Copper, Cu
- Zinc(II) ion, Zn2+
- Zinc, Zn
-
What happens to an element during a disproportionation reaction?
- Reduced only
- Unchanged
- Oxidised and reduced
- Oxidised only
-
Which reaction is a disproportionation?
- Mg + 2HCl -> MgCl2 + H2
- 2KI + Cl2 -> 2KCl + I2
- Zn + 2HCl -> ZnCl2 + H2
- Cl2 + H2O -> HCl + HOCl
-
Write the oxidation number of nitrogen in NO3- using a Roman numeral.
- IV
- III
- V
- VII
-
Which formula has iron in oxidation state +3?
- Fe2O3
- FeS
- FeO
- FeCl2
-
Which formula is correct for the compound containing Fe3+ and sulfate ions?
- Fe3(SO4)2
- Fe2(SO4)3
- FeSO4
- Fe(SO4)3
-
What happens to the oxidation number of a metal when it forms ions?
- Becomes negative
- Increases
- Remains zero
- Decreases
-
What happens to an element's oxidation number when it gains electrons?
- Stays zero
- Remains unchanged
- Increases
- Decreases
-
What name is given to a reaction where the same element is both oxidised and reduced?
- Precipitation
- Disproportionation
- Thermal decomposition
- Neutralisation
-
Which species contains an element with oxidation number +2?
- H2O2
- Cl-
- NaH
- Ca2+
-
What is the oxidation number of nitrogen in nitric acid, HNO3?
- -5
- +1
- +5
- +3
Related quizzes
- Oxidation, reduction and electron transfer Quiz · 3.1.2 · 20 questions
- Ionic half-equations Quiz · 3.1.3 · 20 questions
- Sub-atomic particles, isotopes and relative masses Quiz · 1.1.1 · 20 questions
- Dynamic equilibrium and the equilibrium constant Kc Quiz · 10.1.1 · 20 questions
- Kp and partial pressures Quiz · 11.1.1 · 20 questions
- Brønsted-Lowry acids, bases and conjugate pairs Quiz · 12.1.1 · 20 questions
- Lattice energy and Born-Haber cycles Quiz · 13A.1 · 20 questions
- Standard electrode potentials and the hydrogen electrode Quiz · 14.1.1 · 20 questions
- Electronic configurations and oxidation states Quiz · 15A.1 · 20 questions
- Rate equations and orders of reaction Quiz · 16.1.1 · 20 questions