Lesson 4.6.2.4
4.6.2.4 The effect of changing conditions on equilibrium (HT only) Quiz: AQA Chemistry, Unit 6
20 questions
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Lesson 4.6.2.4, The effect of changing conditions on equilibrium (HT only): 20 multiple choice questions for the AQA GCSE Chemistry (8462), Unit 6: The rate and extent of chemical change, written with Revision Ninja.
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The 20 questions
-
According to Le Chatelier's principle, how does an equilibrium system respond to a change?
- Reverses completely
- Counteracts the change
- Accelerates to completion
- Stops the reaction
-
What determines the relative amounts of reactants and products at equilibrium?
- Reaction conditions
- Initial purity
- Container colour
- Activation energy
-
Higher tier: Which principle predicts the effect of changes on systems at equilibrium?
- Le Chatelier's principle
- Hess's law
- Dalton's law
- Charles's law
-
What occurs when an equilibrium position shifts?
- New relative amounts
- Activation energy changes
- Reaction stops completely
- Temperature drops to zero
-
What type of predictions can students make about equilibrium changes using given data?
- Qualitative predictions
- Enthalpy derivations
- Quantitative calculations
- Thermodynamic proofs
-
How does a system at equilibrium respond when a condition is altered?
- Partly opposes change
- Fully reverses change
- Ignores the change
- Doubles the yield
-
To which type of chemical system does Le Chatelier's principle apply?
- Incomplete combustions
- Single displacement reactions
- Systems at equilibrium
- Non-reversible reactions
-
Higher tier: Which of these is a condition that can be changed on an equilibrium system?
- Number of protons
- Chemical formula
- Atomic mass
- Temperature
-
What does the equilibrium position describe in a reversible reaction?
- Container volume
- Relative amounts present
- Reaction speed
- Activation energy barrier
-
What is affected when you change the conditions of a system at equilibrium?
- Equilibrium position
- Atomic number
- Molar mass
- Isomer structure
-
What is the effect of adding a catalyst to a system at equilibrium?
- Increases product yield
- No position change
- Stops reverse reaction
- Favours reactants
-
Why does a system at equilibrium respond when a condition changes?
- Reverse instantly
- Counteract change
- Accelerate heating
- Stop reacting
-
What should students use to predict equilibrium shifts without experimental data?
- Atomic radius
- Periodic trends
- Random guessing
- Appropriate information
-
What does Le Chatelier's principle fail to predict about a system?
- Exact concentrations
- Pressure changes
- Reaction direction
- Temperature effects
-
What happens after a system at equilibrium is disturbed and responds?
- Complete cessation
- Immediate explosion
- New equilibrium
- Infinite pressure
-
Which principle describes how equilibrium systems respond to outside changes?
- Avogadro law
- Haber process
- Bohr model
- Le Chatelier
-
What principle predicts how an equilibrium system responds to changes?
- Avogadro's Law
- Le Chatelier's Principle
- Boyle's Law
- Conservation of Mass
-
In a closed system at equilibrium, what happens when conditions change?
- New equilibrium
- Forms precipitate
- Stops reacting
- Becomes open
-
Which two complementary concepts are linked by Le Chatelier's principle?
- Energy and moles
- Rate and catalyst
- Mass and volume
- Change and counteraction
-
When does an equilibrium position shift in a closed system?
- Conditions change
- Catalyst added
- Volume fixed
- Time elapses
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