OCR A-Level Chemistry AS Breadth in chemistry (01), June 2024
Every question from OCR A-Level Chemistry AS Breadth in chemistry (01), June 2024 (H032): 25 questions, 70 marks, each with its mark scheme and topic.
- Question 1 1 mark
Identify which diagram shows a p-orbital from a choice of four orbital shapes.
Module 2: Foundations in chemistry · 2.2 Electrons, bonding and structure
- Question 2 1 mark
Determine the number of protons, neutrons, and electrons in the magnesium ion 25Mg2+.
Module 2: Foundations in chemistry · 2.1 Atoms and reactions
- Question 3 1 mark
Calculate the empirical formula of a nitrogen oxide containing 36.84% nitrogen by mass.
Module 2: Foundations in chemistry · 2.1 Atoms and reactions
- Question 4 1 mark
Identify which combination of reactant volumes for carbon monoxide and oxygen produces the largest volume of carbon dioxide at RTP based on the given stoichiometric equation.
Module 2: Foundations in chemistry · 2.1 Atoms and reactions
- Question 5 1 mark
Identify which reaction produces a product with linear molecules from a given set of chemical equations.
Module 2: Foundations in chemistry · 2.2 Electrons, bonding and structure
- Question 6 1 mark
Identify which statement about the periodic table is not correct among the given options.
Module 3: Periodic table and energy · 3.1 The periodic table
- Question 7 1 mark
Identify which Group 2 compound is not suitable for neutralising acid soils or treating indigestion from a multiple-choice list.
Module 3: Periodic table and energy · 3.1 The periodic table
- Question 8 1 mark
Identify the correct statement about the treatment of drinking water with chlorine regarding toxic chlorinated hydrocarbons.
Module 3: Periodic table and energy · 3.1 The periodic table
- Question 9 1 mark
Identify which reaction does not show disproportionation of chlorine from four given chemical equations.
Module 2: Foundations in chemistry · Module 3: Periodic table and energy · 2.1 Atoms and reactions · 3.1 The periodic table
- Question 10 1 mark
Identify the correct sequence of tests required to test an unknown compound for sulfate, carbonate, and halide ions.
Module 3: Periodic table and energy · Practical Activity Groups · 3.1 The periodic table · PAG 4: Qualitative analysis of ions
- Question 11 1 mark
Calculate the enthalpy change using the provided enthalpy cycle involving carbon, carbon monoxide, and carbon dioxide.
Module 3: Periodic table and energy · 3.2 Physical chemistry
- Question 12 1 mark
Identify the correct statement explaining why heating a mixture of gases in a closed container increases the reaction rate.
Module 3: Periodic table and energy · 3.2 Physical chemistry
- Question 13 1 mark
Identify the correct expression for the equilibrium constant Kc for the reversible reaction 2SO2(g) + O2(g) = 2SO3(g).
Module 5: Physical chemistry and transition elements · 5.1 Rates, equilibrium and pH
- Question 14 1 mark
Identify the correct IUPAC name for a given haloalcohol molecule containing a chlorine atom, a methyl branch, and an alcohol functional group.
Module 4: Core organic chemistry · Module 2: Foundations in chemistry · 4.1 Basic concepts and hydrocarbons · 4.2 Alcohols, haloalkanes and analysis
- Question 15 1 mark
Identify the correct terms to describe the hydrocarbon structure provided among multiple-choice options A, B, C, and D.
Module 4: Core organic chemistry · 4.1 Basic concepts and hydrocarbons
- Question 16 1 mark
Identify the property that explains the low reactivity of alkanes from a multiple-choice list.
Module 4: Core organic chemistry · 4.1 Basic concepts and hydrocarbons
- Question 17 1 mark
Identify the correct statement about the addition polymer given its repeat unit structure.
Module 4: Core organic chemistry · Module 6: Organic chemistry and analysis · 4.1 Basic concepts and hydrocarbons · 6.2 Nitrogen compounds, polymers and synthesis
- Question 18 1 mark
Identify the functional groups present in the given organic compound containing a carboxylic acid and a ketone.
Module 4: Core organic chemistry · Module 6: Organic chemistry and analysis · 4.1 Basic concepts and hydrocarbons · 6.1 Aromatic compounds, carbonyls and acids
- Question 19 1 mark
Identify the incorrect statement regarding infrared radiation among the given options involving global warming, ozone depletion, bond vibrations, and breathpolysers.
Module 4: Core organic chemistry · Module 6: Organic chemistry and analysis · 4.2 Alcohols, haloalkanes and analysis · 6.3 Analysis
- Question 20 1 mark
Identify the possible identity of a fragment ion with m/z = 45 produced from the mass spectrum of the alcohol CH3CH2CH(CH3)OH.
Module 4: Core organic chemistry · Module 6: Organic chemistry and analysis · 4.2 Alcohols, haloalkanes and analysis · 6.3 Analysis
- Question 21 7 marks
Calculate the relative atomic mass of iron from a mass spectrum, name and balance equations for iron compounds, and calculate the total volume of gas produced from the thermal decomposition of iron(III) nitrate.
Module 2: Foundations in chemistry · 2.1 Atoms and reactions
- Question 22 8 marks
Differentiate between strong and weak acids, complete titration calculations including table completion and mean titre determination, and calculate the percentage composition by mass of ethanoic acid in a descaler.
Module 2: Foundations in chemistry · Practical Activity Groups · PAG 2: Acid-base titration · 2.1 Atoms and reactions
- Question 23 10 marks
Discuss dynamic equilibrium features, explain Le Chatelier's principle for the Haber process, calculate the N-H bond enthalpy using average bond enthalpies, and draw a dot-and-cross diagram for HCN.
Module 2: Foundations in chemistry · Module 3: Periodic table and energy · 2.2 Electrons, bonding and structure · 3.2 Physical chemistry
- Question 24 14 marks
Analyze boiling points of alkane isomers, complete the mechanism for free radical substitution of ethane with bromine, and predict/explain bond angles and shapes in propene.
Module 2: Foundations in chemistry · Module 4: Core organic chemistry · 2.2 Electrons, bonding and structure · 4.1 Basic concepts and hydrocarbons
- Question 25 11 marks
Deduce structures of isomeric alcohols A, B and C, draw a distillation apparatus, write an equation for haloalkane hydrolysis, and explain relative rates of haloalkane hydrolysis.
Module 4: Core organic chemistry · Practical Activity Groups · 4.2 Alcohols, haloalkanes and analysis · PAG 5: Synthesis of an organic liquid