AQA GCSE Combined Science: Trilogy Chemistry Paper 1 (Higher), June 2025
Every question from AQA GCSE Combined Science: Trilogy Chemistry Paper 1 (Higher), June 2025 (8464): 7 questions, 70 marks, each with its mark scheme and topic.
- Question 1 9 marks
Analyze an electrolysis experiment involving copper chloride and potassium chloride solutions, including safety precautions, graph plotting, data interpretation, concentration calculation, and predicting products based on reactivity.
Chemistry · C3: Quantitative Chemistry · C4: Chemical Changes
- Question 2 10 marks
Define an exothermic reaction, calculate the percentage by mass of oxygen in calcium hydroxide, and plan an investigation into how the mass of calcium oxide affects temperature change.
Chemistry · C3: Quantitative Chemistry · C5: Energy Changes
- Question 3 12 marks
Answer questions on the alpha particle scattering experiment, atomic structure and isotopic notation of a halide ion, and physical and chemical trends in Group 7 elements.
Chemistry · Physics · C1: Atomic Structure and the Periodic Table · C2: Bonding, Structure and the Properties of Matter · P4: Atomic Structure
- Question 4 11 marks
Explain metal extraction methods including reduction by carbon and electrolysis of aluminium oxide, write a half equation, compare extraction costs, and explain why alloys are hard.
Chemistry · C2: Bonding, Structure and the Properties of Matter · C4: Chemical Changes
- Question 5 9 marks
Answer questions on acids, state symbols, covalent dot-and-cross bonding in HOCl, pH and hydrogen ion concentration, weak versus strong acids, and bond energy calculations.
Chemistry · C2: Bonding, Structure and the Properties of Matter · C4: Chemical Changes · C5: Energy Changes
- Question 6 11 marks
Explain mass changes when heating magnesium and magnesium carbonate, interpret predicted vs actual graphs, and determine the balanced equation for the reaction of iron with steam using mole ratios.
Chemistry · C3: Quantitative Chemistry · C4: Chemical Changes
- Question 7 8 marks
Answer questions on ionic, metallic, giant covalent, and polymer structures and bonding.
Chemistry · C2: Bonding, Structure and the Properties of Matter