Lesson 4.6.1.2
4.6.1.2 Factors which affect the rates of chemical reactions Quiz: AQA Chemistry, Unit 6
20 questions
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Lesson 4.6.1.2, Factors which affect the rates of chemical reactions: 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
-
Which factor does not directly affect the rate of a chemical reaction?
- Container colour
- Temperature
- Surface area
- Catalyst presence
-
What happens to the reaction rate when reactant concentration increases?
- It decreases
- It stays constant
- It stops immediately
- It increases
-
Which change reduces the rate of a gas reaction?
- Raising the temperature
- Decreasing pressure
- Adding a catalyst
- Increasing pressure
-
What happens to the rate when a solid reactant is powdered?
- It becomes zero
- It stays constant
- It decreases
- It increases
-
What does Required Practical 5 primarily investigate?
- Titration volumes
- Concentration effects
- Combustion energy
- Electrolysis rates
-
Which visual change is used to measure rate in Required Practical 5?
- Turbidity
- Boiling point
- Melting point
- Electrical conductivity
-
What does turbidity mean in the context of rate experiments?
- Viscosity
- Acidity
- Brightness
- Cloudiness
-
What increases when reactant concentration doubles in a solution?
- Temperature
- Collision frequency
- Activation energy
- Particle size
-
Why does increasing gas pressure increase the rate of reaction?
- More frequent collisions
- Lower energy
- Fewer collisions
- Slower particles
-
Which factor increases rate by making collisions more energetic?
- Surface area
- Concentration
- Pressure
- Temperature
-
What property of a solid reactant increases its reaction rate?
- Higher density
- Lower volume
- Larger surface area
- Greater mass
-
What happens when you increase the concentration of reactants in solution?
- More frequent collisions
- Fewer collisions
- Lower activation energy
- Slower reaction rate
-
Which factor specifically changes the rate of a solid reactant?
- Voltage
- Magnetic field
- Surface area
- Pressure
-
Which factor specifically affects the rate of reactions between gases?
- Pressure
- Surface area
- Concentration
- Volume
-
Which two factors affect rates for solids reacting in solution?
- Density and pressure
- Surface area and concentration
- Mass and volume
- Volume and colour
-
Which apparatus is used to measure the volume of gas produced over time?
- A pH meter only
- A melting point apparatus
- A density bottle
- A gas syringe
-
Why are solid reactants often used in powdered form in reactions?
- To increase surface area
- To increase density
- To decrease concentration
- To lower temperature
-
What happens to the surface area to volume ratio when a solid is crushed?
- It stays the same
- It decreases
- It increases
- It becomes zero
-
Which action increases the pressure and rate of a gas reaction?
- Compressing the gas
- Adding more volume
- Diluting the gas
- Heating the container
-
What happens to reactant particles when temperature is increased?
- Larger particles
- Fewer collisions
- More frequent collisions
- Slower particles
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