OCR A-Level Chemistry AS Breadth in chemistry (01), November 2021
Every question from OCR A-Level Chemistry AS Breadth in chemistry (01), November 2021 (H032): 26 questions, 70 marks, each with its mark scheme and topic.
- Question 1 1 mark
Identify which compound has the highest boiling point among ethanol, heptane, sodium chloride, and water
Module 2: Foundations in chemistry · 2.2 Electrons, bonding and structure
- Question 2 1 mark
Identify which bond has the correct polarity using the given Pauling electronegativity values.
Module 2: Foundations in chemistry · 2.2 Electrons, bonding and structure
- Question 3 1 mark
Identify which compound releases hydroxide ions when it dissolves in water among the given options.
Module 2: Foundations in chemistry · 2.1 Atoms and reactions
- Question 4 1 mark
Identify which of the given alkane options has a carbon composition of 82.8% by mass
Module 2: Foundations in chemistry · 2.1 Atoms and reactions
- Question 5 1 mark
Identify which gas sample has the greatest mass at RTP among four options.
Module 2: Foundations in chemistry · 2.1 Atoms and reactions
- Question 6 1 mark
Calculate the resulting hydroxide ion concentration when mixing potassium hydroxide and calcium hydroxide solutions.
Module 2: Foundations in chemistry · 2.1 Atoms and reactions
- Question 7 1 mark
Identify the correct procedure regarding the droplet remaining in the tip of a pipette after delivering a solution.
Module 1: Development of practical skills in chemistry · Practical Activity Groups · 1.2 Practical skills assessed in the practical endorsement · PAG 2: Acid-base titration
- Question 8 1 mark
Identify which sequence shows elements in order of increasing first ionisation energy.
Module 3: Periodic table and energy · Module 2: Foundations in chemistry · 3.1 The periodic table · 2.2 Electrons, bonding and structure
- Question 9 1 mark
Identify which element among aluminium, oxygen, chlorine, and phosphorus has atoms with the largest number of unpaired p-electrons.
Module 2: Foundations in chemistry · 2.2 Electrons, bonding and structure
- Question 10 1 mark
Calculate the standard enthalpy change of combustion of propene using standard enthalpy changes of formation
Module 3: Periodic table and energy · 3.2 Physical chemistry
- Question 11 1 mark
Identify which Boltzmann distribution graph correctly shows a dotted curve at a higher temperature.
Module 3: Periodic table and energy · 3.2 Physical chemistry
- Question 12 1 mark
Identify which statement about dynamic equilibrium is not correct from four multiple-choice options.
Module 3: Periodic table and energy · 3.2 Physical chemistry
- Question 13 1 mark
Identify the total number of unsaturated isomers (structural and stereoisomers) with the molecular formula C4H8.
Module 4: Core organic chemistry · 4.1 Basic concepts and hydrocarbons
- Question 14 1 mark
Identify what curly arrows always show in reaction mechanisms.
Module 4: Core organic chemistry · 4.1 Basic concepts and hydrocarbons
- Question 15 1 mark
Identify which structural isomer of C7H16 has the weakest induced dipole-dipole interactions (London forces) among four given options.
Module 4: Core organic chemistry · 4.1 Basic concepts and hydrocarbons
- Question 16 1 mark
Identify which of the given compounds (bromoethane, ethanol, ethane, ethene) contains the smallest bond angle.
Module 2: Foundations in chemistry · 2.2 Electrons, bonding and structure
- Question 17 1 mark
Identify the systematic name of the given organic compound containing both an alcohol and an alkene functional group.
Module 4: Core organic chemistry · Module 6: Organic chemistry and analysis · 4.1 Basic concepts and hydrocarbons · 4.2 Alcohols, haloalkanes and analysis
- Question 18 1 mark
Identify the general formula of the dienes homologous series given their structure containing two double bonds.
Module 4: Core organic chemistry · 4.1 Basic concepts and hydrocarbons
- Question 19 1 mark
Identify the correct statement regarding the absorption of radiation from four given options relating to infrared and ultraviolet radiation.
Module 6: Organic chemistry and analysis · 6.3 Analysis
- Question 20 1 mark
Identify the monomer used to form an addition polymer with a given repeat unit.
Module 4: Core organic chemistry · 4.1 Basic concepts and hydrocarbons
- Question 21 8 marks
Complete tables on electron configurations and isotope subatomic particles, calculate relative atomic mass from mass spectrometry data, draw a halothene molecule, and calculate the number of fluorine atoms in a given mass.
Module 2: Foundations in chemistry · Module 4: Core organic chemistry · 2.1 Atoms and reactions · 2.2 Electrons, bonding and structure · 4.1 Basic concepts and hydrocarbons
- Question 22 10 marks
Complete an enthalpy profile diagram for the reversible reaction of methane and steam, explain the effect of pressure and temperature on equilibrium yield using Le Chatelier's principle, and calculate the bond enthalpy of an H-H bond.
Module 3: Periodic table and energy · Module 5: Physical chemistry and transition elements · 3.2 Physical chemistry · 5.1 Rates, equilibrium and pH
- Question 23 9 marks
Describe the risks of chlorine, determine oxidation numbers in a redox reaction, write a balanced equation for a firework reaction, and plan a practical to investigate the reactivity trend of halogens.
Module 2: Foundations in chemistry · Module 3: Periodic table and energy · Practical Activity Groups · PAG 4: Qualitative analysis of ions · 2.1 Atoms and reactions · 3.1 The periodic table
- Question 24 10 marks
Outline the mechanism for the reaction of methylpropene with hydrogen bromide, define structural isomerism, draw an isomer, complete a substitution reaction equation, and draw a labelled reflux apparatus.
Module 1: Development of practical skills in chemistry · Module 4: Core organic chemistry · Practical Activity Groups · 1.2 Practical skills assessed in the practical endorsement · 4.1 Basic concepts and hydrocarbons · 4.2 Alcohols, haloalkanes and analysis · PAG 5: Synthesis of an organic liquid
- Question 25 8 marks
Determine the empirical formula of scandium oxide from mass data, suggest a practical modification to ensure complete reaction, and calculate the molar mass and identity of a gas using the ideal gas equation.
Module 2: Foundations in chemistry · Practical Activity Groups · PAG 1: Moles determination · 2.1 Atoms and reactions
- Question 26 5 marks
Deduce two possible structures for organic compound E containing C, H and O only using its mass spectrum and infrared spectrum.
Module 6: Organic chemistry and analysis · 6.3 Analysis