- If the concentration of a product is increased at equilibrium, the system will:
a) Shift to the right
b) Shift to the left
c) Remain unchanged
d) Decrease the concentration of the product
Answer: b - Which of the following will decrease the value of KcK_cKc for an exothermic reaction?
a) Increasing temperature
b) Increasing pressure
c) Decreasing temperature
d) Adding a catalyst
Answer: a - At equilibrium, the rate of the forward reaction is:
a) Greater than the reverse reaction
b) Less than the reverse reaction
c) Equal to the reverse reaction
d) Zero
Answer: c - If the concentration of reactants is decreased, the equilibrium will:
a) Shift to the right
b) Shift to the left
c) Remain unchanged
d) Increase the reaction rate
Answer: b - Which of the following is NOT a characteristic of a system at equilibrium?
a) The forward and reverse reactions occur at the same rate
b) The concentrations of reactants and products are constant
c) The reaction has stopped
d) The equilibrium constant KcK_cKc is constant
Answer: c - Which of the following statements is true for a dynamic equilibrium?
a) The system is static and no reactions occur
b) The concentrations of reactants and products change constantly
c) The forward and reverse reactions occur at equal rates
d) Only the forward reaction occurs
Answer: c - What is the effect of adding an inert gas to a system at equilibrium?
a) Shifts the equilibrium to the right
b) Shifts the equilibrium to the left
c) No effect on equilibrium
d) Increases the concentration of reactants
Answer: c - If Kc=1K_c = 1Kc=1, the equilibrium mixture contains:
a) More reactants than products
b) More products than reactants
c) Equal concentrations of reactants and products
d) No reactants
Answer: c - For the reaction A⇌BA \rightleftharpoons BA⇌B, the value of KcK_cKc is:
a) Dependent on the concentration of A
b) Dependent on the concentration of B
c) Dependent on temperature
d) Independent of temperature
Answer: c - Which of the following does not affect the value of the equilibrium constant?
a) Concentration of reactants
b) Temperature
c) Pressure
d) Catalyst
Answer: d
