GCSE (9-1) AQA Trilogy Chemistry
Paper 2 Revision Questions &
Answers ( 2026)
How do you find the mean rate of reaction? - CORRECT
ANSWERS ✅- quantity of reactant used / time taken
- quantity of product formed / time taken
What factors affect the rates of chemical reactions? -
CORRECT ANSWERS ✅- Concentration
- Pressure
- Surface area
- Temperature
- Catalysts
What does the collision theory explain? - CORRECT
ANSWERS ✅How various factors affect rates of
reactions
- chemical reactions can occur only when reacting
particles collide with each other and with sufficient
energy
What is activation energy? - CORRECT ANSWERS
✅The minimum amount of energy that particles must
have to react
,GCSE (9-1) AQA Trilogy Chemistry
Paper 2 Revision Questions &
Answers ( 2026)
How do factors affect chemical reactions? - CORRECT
ANSWERS ✅Increasing the factors, increases the rate
of reaction
What do catalysts do? - CORRECT ANSWERS
✅Change the rate of chemical reactions but are not used
up during the reaction
How do catalysts increase the rate of reaction? -
CORRECT ANSWERS ✅By providing a different
pathway for the reaction that has a lower activation
energy
What are reversible reactions? - CORRECT ANSWERS
✅When the products of the reaction can react to produce
the original reactants
- A+B ⇌ C+D
When is equilibrium reached? - CORRECT ANSWERS
✅When the forward and reverse reactions occur at
exactly the same rate
, GCSE (9-1) AQA Trilogy Chemistry
Paper 2 Revision Questions &
Answers ( 2026)
What depends on the conditions of the reaction? -
CORRECT ANSWERS ✅The relative amounts of all the
reactants and products at equilibrium
What happens if a system is at equilibrium and a change
is made to any of the conditions? - CORRECT ANSWERS
✅The system responds to counteract the change
- the effects of changing conditions on a system at
equilibrium can be predicted using Le Chatelier's Principle
What happens if the concentration of one of the reactants
or products is changed? - CORRECT ANSWERS ✅The
system is no longer at equilibrium and the concentrations
of all the substances will change until equilibrium is
reached again
What happens if the concentration of a reactant is
increased? - CORRECT ANSWERS ✅More products will
be formed until equilibrium is reached again
What happens if the concentration of a reactant is
decreased? - CORRECT ANSWERS ✅More reactants
will react until equilibrium is reached again
Paper 2 Revision Questions &
Answers ( 2026)
How do you find the mean rate of reaction? - CORRECT
ANSWERS ✅- quantity of reactant used / time taken
- quantity of product formed / time taken
What factors affect the rates of chemical reactions? -
CORRECT ANSWERS ✅- Concentration
- Pressure
- Surface area
- Temperature
- Catalysts
What does the collision theory explain? - CORRECT
ANSWERS ✅How various factors affect rates of
reactions
- chemical reactions can occur only when reacting
particles collide with each other and with sufficient
energy
What is activation energy? - CORRECT ANSWERS
✅The minimum amount of energy that particles must
have to react
,GCSE (9-1) AQA Trilogy Chemistry
Paper 2 Revision Questions &
Answers ( 2026)
How do factors affect chemical reactions? - CORRECT
ANSWERS ✅Increasing the factors, increases the rate
of reaction
What do catalysts do? - CORRECT ANSWERS
✅Change the rate of chemical reactions but are not used
up during the reaction
How do catalysts increase the rate of reaction? -
CORRECT ANSWERS ✅By providing a different
pathway for the reaction that has a lower activation
energy
What are reversible reactions? - CORRECT ANSWERS
✅When the products of the reaction can react to produce
the original reactants
- A+B ⇌ C+D
When is equilibrium reached? - CORRECT ANSWERS
✅When the forward and reverse reactions occur at
exactly the same rate
, GCSE (9-1) AQA Trilogy Chemistry
Paper 2 Revision Questions &
Answers ( 2026)
What depends on the conditions of the reaction? -
CORRECT ANSWERS ✅The relative amounts of all the
reactants and products at equilibrium
What happens if a system is at equilibrium and a change
is made to any of the conditions? - CORRECT ANSWERS
✅The system responds to counteract the change
- the effects of changing conditions on a system at
equilibrium can be predicted using Le Chatelier's Principle
What happens if the concentration of one of the reactants
or products is changed? - CORRECT ANSWERS ✅The
system is no longer at equilibrium and the concentrations
of all the substances will change until equilibrium is
reached again
What happens if the concentration of a reactant is
increased? - CORRECT ANSWERS ✅More products will
be formed until equilibrium is reached again
What happens if the concentration of a reactant is
decreased? - CORRECT ANSWERS ✅More reactants
will react until equilibrium is reached again
