AP Chemistry Unit 5

Quiz
•
Science
•
11th Grade
•
Hard
+2
Standards-aligned
Lisa Thompson
FREE Resource
25 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which step of a reaction mechanism determines the rate?
the slow step
the fast step
the first step
the second step
Answer explanation
The slow step of a reaction mechanism determines the rate because it is the step with the highest activation energy, leading to the overall rate of the reaction.
Tags
NGSS.HS-PS1-5
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How does a catalyst speed up a reaction?
Adding more reactant
Providing a pathway that has a lower activation energy
Increasing the activation energy
Increasing binding energy
Answer explanation
A catalyst speeds up a reaction by providing a pathway with a lower activation energy, making it easier for the reaction to occur.
Tags
NGSS.HS-PS1-4
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
More collisions correspond to a:
Faster reaction rate
Slower reaction rate
Constant reaction rate
None of the above
Answer explanation
More collisions correspond to a faster reaction rate because a higher frequency of collisions leads to more successful reactions occurring in a given time period.
Tags
NGSS.HS-PS1-5
4.
MATCH QUESTION
1 min • 1 pt
Match the following properties with their classification as either an intensive or extensive property.
Amount of matter in an object
Mass
Temperature at which an object changes from solid to liquid
Metallic
Appearance of an object
Silver
Color of an object
Melting point
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Is this an endothermic or exothermic reaction?
endothermic
exothermic
Answer explanation
The correct choice is 'endothermic' because this reaction absorbs heat from its surroundings, resulting in a decrease in temperature.
Tags
NGSS.HS-PS1-4
NGSS.HS-PS3-1
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the potential energy of the products?
100 kJ
250 kJ
50 kJ
200 kJ
Answer explanation
The potential energy of the products is 100 kJ, as indicated in the correct answer choice.
Tags
NGSS.HS-PS1-4
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the name of k that appears in the equation used to calculate the rate of a chemical reaction?
Reaction Rate
Rate Equation
Rate Law
Rate Constant
Answer explanation
The name of k that appears in the equation used to calculate the rate of a chemical reaction is Rate Constant.
Tags
NGSS.HS-PS1-5
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