Which of the following factors does NOT affect the rate of a chemical reaction?
Unit 3 AOS 2 Chemistry - Key Knowledge questions

Quiz
•
Chemistry
•
12th Grade
•
Medium
Barry Fleming
Used 2+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Temperature
Surface area
Concentration
Atomic number
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the primary role of a catalyst in a chemical reaction?
To increase the yield of products
To lower the activation energy
To change the equilibrium constant
To increase the reaction temperature
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In an energy profile diagram, how does a catalyst affect the activation energy?
It increases the activation energy
It decreases the activation energy
It has no effect on the activation energy
It eliminates the activation energy completely
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following best describes a reversible reaction?
A reaction that cannot be undone
A reaction that proceeds in only one direction
A reaction that can proceed in both forward and reverse directions
A reaction that always reaches completion
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In a homogeneous equilibrium involving aqueous solutions, what does the double arrow (⇌) in the chemical equation represent?
The reaction is irreversible
The forward and reverse reactions are occurring simultaneously
The reaction is incomplete
The reaction is exothermic
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
According to Le Chatelier's principle, how would an increase in temperature affect an exothermic equilibrium reaction?
It would shift the equilibrium to the right
It would shift the equilibrium to the left
It would have no effect on the equilibrium
It would increase the equilibrium constant
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What does the equilibrium constant (K) represent?
The rate of the forward reaction
The rate of the reverse reaction
The ratio of products to reactants at equilibrium
The activation energy of the reaction
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