by michel.jerde
Dive into the fascinating world of chemical equilibrium, where reactions reach a state of balance and the forward and reverse reaction rates are equal. This quiz will challenge your knowledge on various aspects of chemical equilibrium, from Le Chatelier’s principle to equilibrium constants. Sharpen your skills and see how well you understand this fundamental concept in chemistry!
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Chemical Equilibrium Quiz Questions Overview
1. What is the definition of chemical equilibrium?
A state where reactants and products are equal in concentration
A state where the forward and reverse reaction rates are equal
A state where only reactants are present
A state where only products are present
2. Which of the following is true about the equilibrium constant (K)?
It is always greater than 1
It is always less than 1
It is dependent on temperature
It is dependent on the initial concentrations of reactants and products
3. Le Chatelier’s principle states that:
A system at equilibrium will remain at equilibrium unless disturbed
A system at equilibrium will shift to counteract any imposed change
A system at equilibrium will increase the concentration of products
A system at equilibrium will decrease the concentration of reactants
4. In the reaction N2 + 3H2 ⇌ 2NH3, what happens if the concentration of N2 is increased?
The equilibrium will shift to the left
The equilibrium will shift to the right
The equilibrium will remain unchanged
The reaction will stop
5. What is the effect of a catalyst on a chemical equilibrium?
It shifts the equilibrium to the right
It shifts the equilibrium to the left
It increases the rate of both forward and reverse reactions equally
It has no effect on the equilibrium
6. Which of the following changes will not affect the position of equilibrium?
Change in concentration of reactants
Change in pressure
Change in temperature
Addition of a catalyst
7. For the reaction A + B ⇌ C + D, the equilibrium constant expression is:
K = [A][B] / [C][D]
K = [C][D] / [A][B]
K = [A] + [B] / [C] + [D]
K = [C] + [D] / [A] + [B]
8. In an exothermic reaction, what is the effect of increasing temperature on the equilibrium position?
Equilibrium shifts to the right
Equilibrium shifts to the left
Equilibrium remains unchanged
Equilibrium shifts to favor both reactants and products equally
9. For the reaction 2SO2 + O2 ⇌ 2SO3, what is the effect of decreasing the volume of the reaction vessel?
Equilibrium shifts to the right
Equilibrium shifts to the left
Equilibrium remains unchanged
The reaction stops
10. What does a large value of the equilibrium constant (K) indicate about a reaction?
The reaction favors the formation of reactants
The reaction favors the formation of products
The reaction is at equilibrium
The reaction is very slow
11. Which of the following statements is true about a reaction at equilibrium?
The concentrations of reactants and products are equal
The forward and reverse reaction rates are equal
The reaction has stopped
The reaction only proceeds in one direction
12. In the reaction CO + 2H2 ⇌ CH3OH, what happens if the pressure is increased?
The equilibrium shifts to the right
The equilibrium shifts to the left
The equilibrium remains unchanged
The reaction stops
13. What is the effect of adding more reactants to a system at equilibrium?
The equilibrium shifts to the right
The equilibrium shifts to the left
The equilibrium remains unchanged
The reaction stops
14. For the reaction H2 + I2 ⇌ 2HI, what is the effect of adding a catalyst?
The equilibrium shifts to the right
The equilibrium shifts to the left
The equilibrium remains unchanged
The reaction stops
15. What does a small value of the equilibrium constant (K) indicate about a reaction?
The reaction favors the formation of reactants
The reaction favors the formation of products
The reaction is at equilibrium
The reaction is very fast
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