Lesson 5.6.2.4
5.6.2.4 The effect of changing conditions on equilibrium (HT only) Quiz: AQA Combined Science, Unit 13
20 questions
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Lesson 5.6.2.4, The effect of changing conditions on equilibrium (HT only): 20 multiple choice questions for the AQA GCSE Combined Science (8464), Unit 13: The rate and extent of chemical change, written with Revision Ninja.
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The 20 questions
-
If a system at equilibrium is changed, the system responds to:
- Ignore the change
- Counteract the change
- Stop reacting altogether
- Amplify the change
-
Which principle is used to predict the effects of changing conditions on equilibrium?
- Avogadro's Hypothesis
- Boyle's Law
- Conservation of Mass
- Le Chatelier's Principle
-
What determines the relative amounts of reactants and products at equilibrium?
- Catalyst mass
- Reaction conditions
- Container colour
- Initial purity
-
In which direction does an equilibrium shift when a reactant is added?
- No shift
- Towards products
- Stops reacting
- Towards reactants
-
In which direction does an equilibrium shift when a product is removed?
- Towards products
- No shift
- Reverses fully
- Towards reactants
-
What is used to determine the new equilibrium position after a system is disturbed?
- Activation energy graph
- Reaction rate equation
- Periodic table trend
- Le Chatelier's Principle
-
What type of predictions does Le Chatelier's Principle provide about equilibrium shifts?
- Random
- Theoretical
- Qualitative
- Quantitative
-
What effect does adding a catalyst have on an equilibrium position?
- Shifts to products
- Shifts to reactants
- Stops equilibrium
- No effect
-
In N2 + 3H2 to 2NH3, adding more H2 causes the system to:
- Stop reacting
- Shift towards N2
- Shift towards NH3
- Shift towards nothing
-
What does a qualitative prediction using given data state about an equilibrium?
- Exact yield
- Catalyst type
- Reaction temperature
- Direction of shift
-
What happens when a reactant is continuously added to an equilibrium system?
- Reaches equilibrium
- Keeps forming products
- Stops reacting
- Forms more reactants
-
Which environmental factor can shift the position of a chemical equilibrium?
- Temperature
- Container label
- Stirring speed
- Vessel shape
-
How do forward and reverse reaction rates compare at a new equilibrium?
- Forwards faster
- Both zero
- Backwards faster
- Equal
-
What two pieces of information are needed to predict an equilibrium shift?
- Change and equation
- Mass and volume
- Density and state
- Colour and pH
-
Which change has no effect on the position of a chemical equilibrium?
- Adding a catalyst
- Changing temperature
- Changing concentration
- Changing pressure
-
What principle predicts how a system at equilibrium responds to changed conditions?
- Le Chatelier's Principle
- Haber Process
- Conservation of Mass
- Collision Theory
-
What happens to the position of equilibrium when you increase a reactant's concentration?
- Stops completely
- Shifts to products
- Shifts to reactants
- No effect
-
According to Le Chatelier, how does a system respond when a condition is changed?
- Accelerates infinitely
- Stops the reaction
- Counteracts the change
- Reverses permanently
-
What information is needed to make qualitative predictions about an equilibrium shift?
- Balanced equation
- Reaction time
- Activation energy
- Colour intensity
-
What does a qualitative prediction about an equilibrium shift specify?
- Direction of shift
- Reaction time
- Temperature change
- Exact yield
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