AQA GCSE Combined Science: Trilogy Chemistry Paper 2 (Higher), 2020
Every question from AQA GCSE Combined Science: Trilogy Chemistry Paper 2 (Higher), 2020: 7 questions, 70 marks, each with its mark scheme and topic.
- Question 1 9 marks
Balance the combustion equation for propane and describe tests for carbon dioxide, hydrogen, and alkenes in the context of Earth's resources and cracking propane to make propene.
Chemistry · C5: Energy Changes · C7: Organic Chemistry · C8: Chemical Analysis · C10: Using Resources
- Question 2 11 marks
Describe improvements to a rate of reaction method using sodium thiosulfate and hydrochloric acid, calculate a mean rate of reaction from a mass-loss graph, and predict the graph at a higher temperature.
Chemistry · C6: The Rate and Extent of Chemical Change
- Question 3 9 marks
Answer questions about pollutants, including wastewater treatment, percentage decrease in plastic bag use, problems caused by oxides of nitrogen, and trends in nitrogen oxide emissions from car engines.
Chemistry · C9: Chemistry of the Atmosphere · C10: Using Resources
- Question 4 11 marks
Investigate dissolved solids in water samples using evaporation, identify variables and errors, interpret repeat results, and calculate mass in 1 m³ in standard form.
Chemistry · C10: Using Resources · C3: Quantitative Chemistry
- Question 5 13 marks
Describe the formation and fractional distillation of crude oil, state the general formula of alkanes, explain the trend in their boiling points, and predict the trend in flow time for different alkanes using a separating funnel investigation.
Chemistry · C7: Organic Chemistry · C2: Bonding, Structure and the Properties of Matter
- Question 6 10 marks
Answer questions about carbon dioxide in the Earth's atmosphere, including the greenhouse effect, calculation of maximum carbon dioxide mass from a graph, and description of processes causing atmospheric carbon dioxide changes over geological time.
Chemistry · C9: Chemistry of the Atmosphere
- Question 7 7 marks
Describe how a reversible reaction reaches equilibrium and explain how increasing pressure and temperature affect the equilibrium position for 2NO2(g) ⇌ N2O4(g) using the figure provided.
Chemistry · C6: The Rate and Extent of Chemical Change