WJEC GCSE Science (Double Award): Chemistry Exam Questions By Topic

Elements & Compounds, Chemical Symbols & Formulae, Relative Atomic Mass & Relative Molecular Mass, Percentage Composition, Separating Mixtures, Conservation of Mass, Evidence of a Chemical Reaction, Chemical Equations, Percentage Yield, Reacting Masses, The Avogadro Constant & the Mole

Atomic Structure, Atomic Number, Mass Number & Isotopes, The Periodic Table, Electronic Structure, Trends in the Periodic Table, Reactions of Alkali Metals, Testing for Hydrogen Gas, Reactions of Halogens, Group 0 Gases, Testing Cations & Anions

Composition of Water, Sustainable Water Supply, Water Treatment, Fluoridation of Water, Desalination, Distillation, Solubility Curves, Hard Water, Water Softening, Benefits & Drawbacks of Hard Water, Determining Hardness in Water

Structure of the Earth, Plate Tectonics, Plate Boundaries, The Atmosphere, Carbon Dioxide & Sulfur Dioxide Emissions, Global Warming & Acid Rain, Testing for Oxygen & Carbon Dioxide

Determining the Rate of Reaction, Factors Affecting Rates, Hydrochloric Acid & Sodium Thiosulfate, Particle Theory, Catalysts, Rate of Reaction Using Gas Collection

Properties of Substances, Metallic Bonding, Ionic Bonding, Giant Ionic Structures, Covalent Bonding, Intermolecular Bonding, Diamond & Graphite, Fullerenes, Carbon Nano-tubes & Graphene, Bulk Properties, Nano-scale Particles, Smart Materials

The pH Scale, Hydrogen & Hydroxide Ions, Acids Reacting with Metals, Neutralisation of Acids, The Acid-Carbonate Reaction, Making Soluble Salts, Preparing Crystals of a Soluble Salt, Naming Salts, Testing for Sulfate Ions, Titrations, Acid-Base Titration

Metal Ores, Native Metals, Metal Reactivity, Metal Displacement Reactions, Oxidation & Reduction, Extraction of Iron, Electrolysis of Molten Ionic Compounds, Oxidation & Reduction Using Electrons, Extraction of Aluminium, Properties of Metals, Transition Metals, Alloys, Factors Affecting Extraction Processes

Exothermic & Endothermic Reactions, Energy Profiles, Bond Energy Calculations

Crude Oil, Fractions in Crude Oil, Impact of the Oil Industry, Combustion of Hydrocarbons, Energy Density of a Fuel, Energy from Fuels, Hydrogen as a Fuel, The Fire Triangle, Cracking Hydrocarbons, Naming Alkanes & Alkenes, Isomerism in Hydrocarbons, Addition Polymerisation, Alkenes, Plastics