AQA GCSE COMBINED SCIENCE TRILOGY
8464 C 1F CHEMISTRY PAPER 1F FINAL PAPER
2026 COMPLETE QUESTIONS AND ANSWERS
FULL SOLUTION GRADED A+
◉ break down effluent using micro-organisms. Answer: treating
sewage: aerobic biological treatment is used to...
◉ solid waste. Answer: sludge is...
◉ liquid sewage. Answer: effluent is...
◉ crimson. Answer: flame tests: Li
◉ yellow. Answer: flame tests: Na
◉ lilac. Answer: flame tests: K
◉ red. Answer: flame tests: Ca
◉ green. Answer: flame tests: Ba
,◉ white. Answer: silver nitrate precipitate test: Cl
◉ cream. Answer: silver nitrate precipitate test: Br
◉ yellow. Answer: silver nitrate precipitate test: I
◉ white, dissolves in excess NaOH. Answer: NaOH precipitate test: Al
◉ blue. Answer: NaOH precipitate test: Cu
◉ white. Answer: NaOH precipitate test: Mg
◉ white. Answer: NaOH precipitate test: Ca
◉ brown. Answer: NaOH precipitate test: Fe³⁺
◉ green. Answer: NaOH precipitate test: Fe²⁺
◉ symbol for solid. Answer: s
◉ symbol for liquid. Answer: l
,◉ symbol for gas. Answer: g
◉ symbol for aqueous solution. Answer: aq
◉ the only true liquid. Answer: water
◉ formula to find mean rate of reaction (using quantity of reactant
used). Answer: RoRxn = quantity of reactant used ÷ time
◉ formula to find mean rate of reaction (using quantity of product
formed). Answer: RoRxn = quantity of product formed ÷ time
◉ abbreviation for rate of reaction. Answer: RoRxn
◉ units for mass of products/reactants. Answer: g
◉ units for volume of products/reactants. Answer: cm³
◉ steeper tangent shows the RoRxn is. Answer: faster
◉ less steep tangent shows the RoRxn is. Answer: slower
, ◉ factors that affect RoRxn. Answer: concentration, pressure,
temperature, surface area, catalysts
◉ formula for calculating RoRxn using a graph (where time is on the
x-axis). Answer: RoRxn = ∆y ÷ ∆x
◉ formula for calculating RoRxn using a graph (where time is on the
y-axis). Answer: RoRxn = ∆x ÷∆y
◉ ways to increase RoRxn. Answer: increase
temperature/pressure/concentration/surface area, add catalysts
◉ minimum amount of energy required in a collision for a reaction
to take place. Answer: activation energy
◉ more successful collisions ➜. Answer: faster RoRxn
◉ solutions consist of 2 things:. Answer: solute and solvent
◉ the solid in a solution. Answer: solute
◉ the liquid in a solution. Answer: solvent
8464 C 1F CHEMISTRY PAPER 1F FINAL PAPER
2026 COMPLETE QUESTIONS AND ANSWERS
FULL SOLUTION GRADED A+
◉ break down effluent using micro-organisms. Answer: treating
sewage: aerobic biological treatment is used to...
◉ solid waste. Answer: sludge is...
◉ liquid sewage. Answer: effluent is...
◉ crimson. Answer: flame tests: Li
◉ yellow. Answer: flame tests: Na
◉ lilac. Answer: flame tests: K
◉ red. Answer: flame tests: Ca
◉ green. Answer: flame tests: Ba
,◉ white. Answer: silver nitrate precipitate test: Cl
◉ cream. Answer: silver nitrate precipitate test: Br
◉ yellow. Answer: silver nitrate precipitate test: I
◉ white, dissolves in excess NaOH. Answer: NaOH precipitate test: Al
◉ blue. Answer: NaOH precipitate test: Cu
◉ white. Answer: NaOH precipitate test: Mg
◉ white. Answer: NaOH precipitate test: Ca
◉ brown. Answer: NaOH precipitate test: Fe³⁺
◉ green. Answer: NaOH precipitate test: Fe²⁺
◉ symbol for solid. Answer: s
◉ symbol for liquid. Answer: l
,◉ symbol for gas. Answer: g
◉ symbol for aqueous solution. Answer: aq
◉ the only true liquid. Answer: water
◉ formula to find mean rate of reaction (using quantity of reactant
used). Answer: RoRxn = quantity of reactant used ÷ time
◉ formula to find mean rate of reaction (using quantity of product
formed). Answer: RoRxn = quantity of product formed ÷ time
◉ abbreviation for rate of reaction. Answer: RoRxn
◉ units for mass of products/reactants. Answer: g
◉ units for volume of products/reactants. Answer: cm³
◉ steeper tangent shows the RoRxn is. Answer: faster
◉ less steep tangent shows the RoRxn is. Answer: slower
, ◉ factors that affect RoRxn. Answer: concentration, pressure,
temperature, surface area, catalysts
◉ formula for calculating RoRxn using a graph (where time is on the
x-axis). Answer: RoRxn = ∆y ÷ ∆x
◉ formula for calculating RoRxn using a graph (where time is on the
y-axis). Answer: RoRxn = ∆x ÷∆y
◉ ways to increase RoRxn. Answer: increase
temperature/pressure/concentration/surface area, add catalysts
◉ minimum amount of energy required in a collision for a reaction
to take place. Answer: activation energy
◉ more successful collisions ➜. Answer: faster RoRxn
◉ solutions consist of 2 things:. Answer: solute and solvent
◉ the solid in a solution. Answer: solute
◉ the liquid in a solution. Answer: solvent
