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Northern Ireland · CCEAQ&A
ChemistryQ&A by dot point
A short Q&A bank for every Northern Ireland Chemistry syllabus dot point. Each question and answer is drawn directly from our worked dot-point page, so you can scan key concepts before opening the long-form answer.
Unit 1 Structures, Trends, Chemical Reactions and Analysis
- The structure of the atom in terms of protons, neutrons and electrons, atomic number and mass number, isotopes, and the calculation of relative atomic mass from isotopic abundances.2Q&A pairs
- Electron arrangement in shells for the first 20 elements, writing electron configurations, and the link between outer-shell electrons, the group number and chemical reactivity.2Q&A pairs
- Elements, compounds and mixtures, the difference between physical and chemical change, and the separation techniques of filtration, crystallisation, distillation, fractional distillation and chromatography.2Q&A pairs
- The properties and trends of the Group 1 alkali metals, the Group 7 halogens and the Group 0 noble gases, including reactivity trends and displacement reactions of the halogens.2Q&A pairs
- The development and modern organisation of the Periodic Table by atomic number into periods and groups, the position of metals and non-metals, and how the table predicts properties.2Q&A pairs
Unit 1 Structures, Trends, Chemical Reactions and Analysis
- Covalent bonding as the sharing of electron pairs between non-metal atoms, drawing dot-and-cross diagrams for simple molecules, and the properties of simple molecular substances.2Q&A pairs
- Giant covalent structures, the structures and properties of diamond, graphite and silicon dioxide, and how bonding explains hardness, melting point and electrical conductivity.2Q&A pairs
- Ionic bonding as the transfer of electrons to form charged ions, drawing dot-and-cross diagrams, the giant ionic lattice, and how the structure explains the properties of ionic compounds.2Q&A pairs
- Metallic bonding as positive ions in a sea of delocalised electrons, how this explains the properties of metals, and why alloys are harder than the pure metal.2Q&A pairs
- Nanoparticles and nanoscience, the large surface area to volume ratio of nanoparticles, their uses, and the benefits and risks of nanotechnology.2Q&A pairs
Unit 1 Structures, Trends, Chemical Reactions and Analysis
- Acids, bases and alkalis in terms of hydrogen and hydroxide ions, the pH scale and indicators, neutralisation, and the reactions of acids with metals, oxides, hydroxides and carbonates.2Q&A pairs
- The solubility rules for salts, preparing a soluble salt from an acid and an insoluble base, and preparing an insoluble salt by precipitation.3Q&A pairs
- Using the mole and balanced symbol equations to calculate reacting masses, the conservation of mass, and finding empirical formulae from mass or percentage data.2Q&A pairs
- Relative formula mass, the mole as a counting unit, the relationship between moles, mass and relative formula mass, and calculating percentage composition by mass.2Q&A pairs
- Writing chemical formulae from ions, constructing word and balanced symbol equations with state symbols, and writing simple ionic equations for neutralisation and precipitation.3Q&A pairs
- Qualitative analysis: flame tests and sodium hydroxide tests for metal ions, tests for halide, sulfate and carbonate ions, and the tests for hydrogen, oxygen, carbon dioxide and chlorine.2Q&A pairs
Unit 2 Further Chemical Reactions, Rates and Equilibrium, Calculations and Organic Chemistry
- The rusting of iron and the conditions needed, and methods of preventing corrosion including barrier methods, galvanising and sacrificial protection.2Q&A pairs
- Electrolysis of molten ionic compounds and of aqueous solutions including brine, predicting the products at each electrode, and writing electrode half-equations.2Q&A pairs
- How the reactivity of a metal determines its extraction method, the extraction of iron by reduction with carbon in the blast furnace, and why reactive metals are extracted by electrolysis.2Q&A pairs
- The reactivity series of metals, the reactions of metals with water and acid, and displacement reactions of metals with metal salt solutions.2Q&A pairs
- Oxidation and reduction defined in terms of oxygen and of electrons (OIL RIG), identifying redox in displacement and other reactions, and writing half-equations.2Q&A pairs
Unit 2 Further Chemical Reactions, Rates and Equilibrium, Calculations and Organic Chemistry
- Addition polymerisation of alkenes to form polymers, drawing the repeating unit, naming common addition polymers and their uses, and the problems of plastic disposal.2Q&A pairs
- Alcohols as a homologous series with the OH functional group, the production of ethanol by fermentation and by hydration of ethene, and the uses and combustion of alcohols.2Q&A pairs
- Alkanes and alkenes as saturated and unsaturated hydrocarbons, their general formulae and combustion, the bromine water test for unsaturation, and cracking.2Q&A pairs
- Concentration in g per dm cubed and mol per dm cubed, using titration results to find an unknown concentration, and calculating percentage yield.2Q&A pairs
- Crude oil as a mixture of hydrocarbons, its separation by fractional distillation into fractions, and how the properties of fractions change with chain length.2Q&A pairs
- The composition of the atmosphere, the pollutants from burning fuels (carbon monoxide, sulfur dioxide, oxides of nitrogen, particulates), and the greenhouse effect and global warming.2Q&A pairs
Unit 2 Further Chemical Reactions, Rates and Equilibrium, Calculations and Organic Chemistry
- Collision theory, activation energy, how concentration, temperature and surface area change the frequency and energy of collisions, and how catalysts work by lowering activation energy.2Q&A pairs
- Exothermic and endothermic reactions, energy level diagrams, and measuring temperature changes using calorimetry to compare the energy released by fuels.2Q&A pairs
- The factors that affect the rate of reaction (concentration, temperature, surface area and catalysts), how rate is measured by gas volume or mass loss, and interpreting rate graphs.2Q&A pairs
- Reversible reactions and dynamic equilibrium, how changing conditions shifts the position of equilibrium, and the conditions used in the Haber process to make ammonia.2Q&A pairs