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Y9 Rates of reaction
By Mr Pike
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Last updated 4 days ago
15 questions
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Formative Generation Completed!
Formative Generation Completed!
Question 1
1.
What generally happens to rate of reaction as temperature increases?
It slows down
It speeds up
It stays the same
It becomes unpredictable
Question 2
2.
Can changing the concentration of reactants alter the rate of reaction?
True
False
Question 3
3.
What is the role of a catalyst in a chemical reaction?
Speeds up the reaction
Slows down the reaction
Stops the reaction
Has no effect
Question 4
4.
Which factors can increase the rate of a chemical reaction?
Increasing temperature
Adding a catalyst
Increasing concentration of reactants
Using bigger reaction vessels
Question 5
5.
What happens to the rate of reaction when the surface area of a solid reactant is increased?
Increases
Decreases
Stays constant
Becomes zero
Question 6
6.
The rate of a reaction refers to how quickly reactants are used up or products are formed.
True
False
Question 7
7.
Which of the following are true about the rates of reactions at equilibrium?
The forward and reverse rates are equal
The concentration of the reactants and products remains constant
The reaction has stopped
The rate can still be changed by changing the temperature
Question 8
8.
Which graph correctly shows how rate of reaction changes with increasing temperature?
Steeply rising
A flat line
Falling steadily
A line with peaks and troughs
Question 9
9.
A catalyst lowers the activation energy of a reaction.
True
False
Question 10
10.
Which of these would increase the rate of a gas reaction?
Increasing the temperature
Increasing the pressure
Increasing the volume of the container
Adding a catalyst
Question 11
11.
What is meant by the term 'rate equation' in terms of rate of reaction?
It is a mathematical equation that shows how the rate of reaction depends on the concentration of reactants
It is a prediction of the total rate of reaction
It refers to the equation of the chemical reaction itself
It refers to the balance between the forward and reverse rates at equilibrium
Question 12
12.
All reactions proceed at the same rate under equivalent conditions.
True
False
Question 13
13.
What effect does a decrease in concentration have on the rate of reaction?
Decreases the rate of reaction
Increases the rate of reaction
Makes no difference to the rate of reaction
Stops the reaction
Question 14
14.
In a reaction diagram, what does the peak of the curve represent?
The reactants
The products
The activation energy
The overall energy change
Question 15
15.
Pressure only affects the rate of reaction for reactions involving gases.
True
False