AQA GCSE Combined Science: Trilogy Chemistry Paper 2 (Higher), 2021
Every question from AQA GCSE Combined Science: Trilogy Chemistry Paper 2 (Higher), 2021: 6 questions, 70 marks, each with its mark scheme and topic.
- Question 1 10 marks
Investigate how changing the concentration of hydrochloric acid affects the rate of reaction with magnesium, including identifying variables, plotting volume of gas against time, interpreting the trend, and explaining the effect of temperature using collision theory.
Chemistry · Required Practicals · C6: The Rate and Extent of Chemical Change · Chemistry Required Practicals
- Question 2 11 marks
Answer questions about crude oil hydrocarbons, including the origin of crude oil, naming an alkane, comparing methane and hexane, completing a cracking equation, and testing for alkenes.
Chemistry · C7: Organic Chemistry · C2: Bonding, Structure and the Properties of Matter
- Question 3 13 marks
Answer questions on testing for water with copper sulfate, defining a pure substance, calculating impurity from boiling point data, and explaining distillation and the cost of obtaining potable water from different sources.
Chemistry · Required Practicals · C8: Chemical Analysis · C10: Using Resources · Chemistry Required Practicals
- Question 4 12 marks
Interpret a graph of world copper production, explain reasons for the trend, evaluate limitations of predicting future production, order stages in phytomining, compare disadvantages of phytomining with traditional mining, and calculate energy savings from recycling copper.
Chemistry · C10: Using Resources
- Question 5 13 marks
Explain and calculate aspects of atmospheric pollution from cars, including nitrogen dioxide formation, concentration data analysis, catalytic converter chemistry, finite resources, and life cycle assessment of a car.
Chemistry · C9: Chemistry of the Atmosphere · C10: Using Resources · C1: Atomic Structure and the Periodic Table · C3: Quantitative Chemistry
- Question 6 11 marks
Explain and apply ideas about catalysts, reversible reactions, equilibrium, pressure and temperature in the Haber process for ammonia production, including testing for the absence of carbon dioxide.
Chemistry · C6: The Rate and Extent of Chemical Change · C8: Chemical Analysis · C10: Using Resources