OCR A-Level Chemistry Periodic table, elements and physical chemistry (01), June 2019
Every question from OCR A-Level Chemistry Periodic table, elements and physical chemistry (01), June 2019 (H432): 21 questions, 100 marks, each with its mark scheme and topic.
- Question 1 1 mark
Identify which electron configuration box diagram correctly represents an atom of carbon
Module 2: Foundations in chemistry · 2.2 Electrons, bonding and structure
- Question 2 1 mark
Identify the correct statement regarding the redox reactions of halogens and halide ions from multiple choice options
Module 3: Periodic table and energy · 3.1 The periodic table
- Question 3 1 mark
Identify the possible formula of a gas given that one molecule has a mass of 2.658 x 10^-23 g.
Module 2: Foundations in chemistry · 2.1 Atoms and reactions
- Question 4 1 mark
Calculate the minimum mass of anhydrous sodium carbonate required to neutralise a given volume and concentration of hydrochloric acid.
Module 2: Foundations in chemistry · 2.1 Atoms and reactions
- Question 5 1 mark
Determine the oxidation number of nitrogen in the compound Mg(NO2)2•3H2O.
Module 2: Foundations in chemistry · 2.1 Atoms and reactions
- Question 6 1 mark
Identify which of the four given chemical equations represents a redox reaction.
Module 2: Foundations in chemistry · 2.1 Atoms and reactions
- Question 7 1 mark
Identify the set of elements in the solid state that contains a simple molecular lattice, a giant covalent lattice, and a giant metallic lattice.
Module 2: Foundations in chemistry · Module 3: Periodic table and energy · 2.2 Electrons, bonding and structure · 3.1 The periodic table
- Question 8 1 mark
Identify a Group 2 metal given the mass of the metal reacted and the mass of the chloride formed.
Module 3: Periodic table and energy · 3.1 The periodic table
- Question 9 1 mark
Identify which statement is not correct for Group 2 hydroxides among the given options.
Module 3: Periodic table and energy · 3.1 The periodic table
- Question 10 1 mark
Calculate the energy released during the breakdown of a given volume of ozone using the enthalpy change of the reaction and the molar gas volume.
Module 2: Foundations in chemistry · Module 3: Periodic table and energy · 2.1 Atoms and reactions · 3.2 Physical chemistry
- Question 11 1 mark
Calculate the activation energy in kJ mol⁻¹ given the gradient of an Arrhenius plot of ln k against 1/T.
Module 5: Physical chemistry and transition elements · 5.1 Rates, equilibrium and pH
- Question 12 1 mark
Identify the conjugate acid-base pair from the given dissociation equation of the acid H3AsO4 in water.
Module 5: Physical chemistry and transition elements · 5.1 Rates, equilibrium and pH
- Question 13 1 mark
Determine the number of stereoisomers that the complex Ni(H2NCH2CH2NH2)2Cl2 can form.
Module 5: Physical chemistry and transition elements · 5.3 Transition elements
- Question 14 1 mark
Identify the correct properties of a transition element from a given list of statements about partially filled d sub-shells, variable oxidation states, and coloured ions.
Module 5: Physical chemistry and transition elements · 5.3 Transition elements
- Question 15 1 mark
Identify the correct statements for an alkaline hydrogen-oxygen fuel cell using standard electrode potential data.
Module 5: Physical chemistry and transition elements · 5.2 Energy
- Question 16 15 marks
Assess periodic table properties, relative isotopic mass calculations, reactions of Group 2 oxides, and Born-Haber cycle enthalpy changes including lattice enthalpy calculations and trends in ionization energy and lattice enthalpy.
Module 3: Periodic table and energy · Module 5: Physical chemistry and transition elements · Module 2: Foundations in chemistry · 5.2 Energy · 3.1 The periodic table · 2.1 Atoms and reactions · 2.2 Electrons, bonding and structure
- Question 17 9 marks
Explain how the carbonic acid-hydrogencarbonate buffer maintains blood pH and calculate the buffer ratio, and explain oxygen transport and carbon monoxide toxicity in terms of ligand substitution in haemoglobin.
Module 5: Physical chemistry and transition elements · 5.1 Rates, equilibrium and pH · 5.3 Transition elements
- Question 18 18 marks
Analyze reactions of transition metal ions including chromium complexes, vanadium redox potentials, and titration calculations involving iron(II) gluconate.
Module 5: Physical chemistry and transition elements · Module 2: Foundations in chemistry · Practical Activity Groups · 5.3 Transition elements · 5.2 Energy · PAG 2: Acid-base titration · 2.1 Atoms and reactions
- Question 19 23 marks
Calculate enthalpy changes, entropy, free energy, equilibrium constants (Kp), and analyze reaction rates and catalysis in the industrial manufacture of sulfuric acid.
Module 3: Periodic table and energy · Module 5: Physical chemistry and transition elements · Module 6: Organic chemistry and analysis · 3.2 Physical chemistry · 5.1 Rates, equilibrium and pH · 5.2 Energy · 5.3 Transition elements
- Question 20 14 marks
Calculate pH of weak acids and buffer solutions, determine titration curves, choose suitable indicators, and explain assumptions in acid dissociation.
Module 5: Physical chemistry and transition elements · 5.1 Rates, equilibrium and pH
- Question 21 6 marks
Explain how reaction orders are determined from students' results for the reaction between bromine and propanone, and determine the rate equation and rate constant.
Module 5: Physical chemistry and transition elements · 5.1 Rates, equilibrium and pH