Oxford Cambridge and RSA
Monday 10 June 2024 – Morning
A Level Chemistry A
H432/01 Periodic table, elements and physical chemistry
Time allowed: 2 hours 15 minutes
Turn over
, 2
SECTION A
You should spend a maximum of 20 minutes on this section.
Write your answer to each question in the box provided.
1 Oxygen has the electron configuration 1s22s22p4.
How are the electrons in an atom of oxygen arranged in the p-orbitals?
A
↑↑ ↑↑
B
↑↓ ↑↓
C
↑↑ ↑ ↑
D
↑↓ ↑ ↑
Your answer [1]
2 Water has the anomalous properties below.
• Water has relatively high melting and boiling points.
• Ice is less dense than water.
Which statement explains these anomalous properties?
A The covalent bonding within water molecules.
B The hydrogen bonding between water molecules.
C The induced dipole–dipole interactions (London forces) between water molecules.
D The ionic bonding between water molecules.
Your answer [1]
© OCR 2024
, 3
3 Which chemical process is the most sustainable in terms of the atom economy of the iron
produced?
A Fe2O3 + 3CO 2Fe + 3CO2
B Fe2O3 + 3H2 2Fe + 3H2O
C 2Fe2O3 4Fe + 3O2
D 2Fe2O3 + 3C 4Fe + 3CO2
Your answer [1]
4 Which compounds of magnesium can be used as ‘antacids’?
A Chlorides
B Hydroxides
C Nitrates
D Sulfates
Your answer [1]
5 Which statement explains the trend in boiling points down the halogens group?
A The bond enthalpy of the covalent bonds increases.
B The halogens become less electronegative.
C The induced dipole–dipole interactions (London forces) become stronger.
D The reactivity of the halogens decreases.
Your answer [1]
© OCR 2024 Turn over
, 4
6 Which equation does not represent a disproportionation reaction?
A Cl 2 + H2O HCl O + HCl
B Cl 2 + 2NaOH NaCl O + NaCl + H2O
C 4KCl O3 KCl + 3KCl O4
D 4HCl + MnO2 MnCl 2 + Cl 2 + 2H2O
Your answer [1]
7 The equation for the reaction of sulfuric acid with potassium hydroxide is shown below.
H2SO4(aq) + 2KOH(aq) K2SO4(aq) + 2H2O(l)
25 cm3 of 1.00 mol dm–3 H2SO4 is reacted with excess KOH.
The energy given out is 2.8 kJ.
What is the enthalpy change of neutralisation, in kJ mol–1?
A –56
B –70
C –112
D –224
Your answer [1]
8 Which row in the table explains how a catalyst affects the activation energy (Ea) and the
proportion of molecules with energy > Ea?
How the activation Proportion of molecules
energy changes with energy > Ea
A decreases decreases
B decreases increases
C increases decreases
D increases increases
Your answer [1]
© OCR 2024
Monday 10 June 2024 – Morning
A Level Chemistry A
H432/01 Periodic table, elements and physical chemistry
Time allowed: 2 hours 15 minutes
Turn over
, 2
SECTION A
You should spend a maximum of 20 minutes on this section.
Write your answer to each question in the box provided.
1 Oxygen has the electron configuration 1s22s22p4.
How are the electrons in an atom of oxygen arranged in the p-orbitals?
A
↑↑ ↑↑
B
↑↓ ↑↓
C
↑↑ ↑ ↑
D
↑↓ ↑ ↑
Your answer [1]
2 Water has the anomalous properties below.
• Water has relatively high melting and boiling points.
• Ice is less dense than water.
Which statement explains these anomalous properties?
A The covalent bonding within water molecules.
B The hydrogen bonding between water molecules.
C The induced dipole–dipole interactions (London forces) between water molecules.
D The ionic bonding between water molecules.
Your answer [1]
© OCR 2024
, 3
3 Which chemical process is the most sustainable in terms of the atom economy of the iron
produced?
A Fe2O3 + 3CO 2Fe + 3CO2
B Fe2O3 + 3H2 2Fe + 3H2O
C 2Fe2O3 4Fe + 3O2
D 2Fe2O3 + 3C 4Fe + 3CO2
Your answer [1]
4 Which compounds of magnesium can be used as ‘antacids’?
A Chlorides
B Hydroxides
C Nitrates
D Sulfates
Your answer [1]
5 Which statement explains the trend in boiling points down the halogens group?
A The bond enthalpy of the covalent bonds increases.
B The halogens become less electronegative.
C The induced dipole–dipole interactions (London forces) become stronger.
D The reactivity of the halogens decreases.
Your answer [1]
© OCR 2024 Turn over
, 4
6 Which equation does not represent a disproportionation reaction?
A Cl 2 + H2O HCl O + HCl
B Cl 2 + 2NaOH NaCl O + NaCl + H2O
C 4KCl O3 KCl + 3KCl O4
D 4HCl + MnO2 MnCl 2 + Cl 2 + 2H2O
Your answer [1]
7 The equation for the reaction of sulfuric acid with potassium hydroxide is shown below.
H2SO4(aq) + 2KOH(aq) K2SO4(aq) + 2H2O(l)
25 cm3 of 1.00 mol dm–3 H2SO4 is reacted with excess KOH.
The energy given out is 2.8 kJ.
What is the enthalpy change of neutralisation, in kJ mol–1?
A –56
B –70
C –112
D –224
Your answer [1]
8 Which row in the table explains how a catalyst affects the activation energy (Ea) and the
proportion of molecules with energy > Ea?
How the activation Proportion of molecules
energy changes with energy > Ea
A decreases decreases
B decreases increases
C increases decreases
D increases increases
Your answer [1]
© OCR 2024
