AQA GCSE Combined Science: Trilogy Chemistry Paper 2 (Higher), 2018
Every question from AQA GCSE Combined Science: Trilogy Chemistry Paper 2 (Higher), 2018: 6 questions, 70 marks, each with its mark scheme and topic.
- Question 1 11 marks
Answer a set of short and extended questions on crude oil fractions, alkanes and alkenes, combustion, and life cycle assessment data for biodegradable plastic bag disposal.
Chemistry · C7: Organic Chemistry · C9: Chemistry of the Atmosphere · C10: Using Resources
- Question 2 12 marks
Answer questions about greenhouse gases, effects of climate change, calculating the carbon footprint of a plastic bottle, reducing carbon dioxide emissions in manufacture, and explaining how Earth's atmosphere has changed from the early atmosphere to today.
Chemistry · C9: Chemistry of the Atmosphere · C10: Using Resources
- Question 3 9 marks
Calculate dissolved solids from mass data and percentage composition, and describe the difference between potable and pure water and how groundwater and seawater are treated to produce potable water.
Chemistry · C10: Using Resources · C3: Quantitative Chemistry
- Question 4 9 marks
Define a formulation, calculate the number of moles of ammonium nitrate in a fertiliser bag, and explain why potassium chloride has a high melting point.
Chemistry · C2: Bonding, Structure and the Properties of Matter · C3: Quantitative Chemistry · C10: Using Resources
- Question 5 17 marks
A multi-part chemistry question on the reaction of marble chips with hydrochloric acid, including completing the symbol equation, interpreting rate graphs and tables, calculating surface area, and explaining the effects of chip size and acid concentration using collision theory.
Chemistry · C4: Chemical Changes · C6: The Rate and Extent of Chemical Change
- Question 6 12 marks
Answer short questions on testing for chlorine gas and explaining how changing conditions affect dynamic equilibrium in reversible reactions using Le Chatelier’s Principle.
Chemistry · C6: The Rate and Extent of Chemical Change · C8: Chemical Analysis