Q. For the reaction A + B ⇌ C + D, if the concentration of A is increased, what will happen to the equilibrium?
A.
Shift to the right
B.
Shift to the left
C.
No change
D.
Reaction stops
Show solution
Solution
Increasing the concentration of A will shift the equilibrium to the right to produce more products C and D.
Correct Answer:
A
— Shift to the right
Learn More →
Q. In a dynamic equilibrium, which of the following is true?
A.
The rates of the forward and reverse reactions are equal
B.
The concentrations of reactants and products are equal
C.
The reaction has stopped
D.
Only the forward reaction occurs
Show solution
Solution
In dynamic equilibrium, the rates of the forward and reverse reactions are equal, but the concentrations of reactants and products may not be equal.
Correct Answer:
A
— The rates of the forward and reverse reactions are equal
Learn More →
Q. In a reversible reaction, what happens to the equilibrium constant if the concentration of products is increased?
A.
It increases
B.
It decreases
C.
It remains the same
D.
It becomes zero
Show solution
Solution
The equilibrium constant remains the same regardless of the concentrations of reactants or products, as it is only affected by temperature.
Correct Answer:
C
— It remains the same
Learn More →
Q. In the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g), what will happen if SO3 is removed from the system?
A.
The equilibrium will shift to the right
B.
The equilibrium will shift to the left
C.
No change in equilibrium position
D.
The reaction will stop
Show solution
Solution
Removing SO3 will shift the equilibrium to the right to produce more SO3, according to Le Chatelier's principle.
Correct Answer:
A
— The equilibrium will shift to the right
Learn More →
Q. What happens to the equilibrium constant when the reaction is reversed?
A.
It remains the same
B.
It is squared
C.
It is inverted
D.
It doubles
Show solution
Solution
When a reaction is reversed, the equilibrium constant is inverted (1/K).
Correct Answer:
C
— It is inverted
Learn More →
Q. What is the effect of adding a catalyst to a system at equilibrium?
A.
It shifts the equilibrium to the right
B.
It shifts the equilibrium to the left
C.
It increases the rate of the forward reaction only
D.
It has no effect on the position of equilibrium
Show solution
Solution
A catalyst increases the rate of both the forward and reverse reactions equally, thus having no effect on the position of equilibrium.
Correct Answer:
D
— It has no effect on the position of equilibrium
Learn More →
Q. What is the effect of increasing temperature on the equilibrium position of an exothermic reaction?
A.
The equilibrium shifts to the right
B.
The equilibrium shifts to the left
C.
No effect on the equilibrium position
D.
The reaction rate increases
Show solution
Solution
According to Le Chatelier's principle, increasing the temperature of an exothermic reaction shifts the equilibrium position to the left, favoring the reactants.
Correct Answer:
B
— The equilibrium shifts to the left
Learn More →
Q. Which of the following changes will shift the equilibrium of the reaction N2(g) + 3H2(g) ⇌ 2NH3(g) to the right?
A.
Increasing the volume of the container
B.
Adding more N2
C.
Removing NH3
D.
Decreasing the temperature
Show solution
Solution
Decreasing the temperature of an exothermic reaction will shift the equilibrium to the right, favoring the formation of products.
Correct Answer:
D
— Decreasing the temperature
Learn More →
Q. Which of the following statements about equilibrium is true?
A.
Equilibrium can only be achieved in closed systems
B.
Equilibrium means that the concentrations of reactants and products are equal
C.
At equilibrium, the forward reaction stops
D.
Equilibrium is a static state
Show solution
Solution
Equilibrium can only be achieved in closed systems where no substances can enter or leave.
Correct Answer:
A
— Equilibrium can only be achieved in closed systems
Learn More →
Showing 1 to 9 of 9 (1 Pages)
