Equilibrium

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Q. For the reaction N2(g) + 3H2(g) ⇌ 2NH3(g), what happens to the equilibrium constant if the temperature is increased?
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Depends on the pressure
Q. For the reaction N2(g) + 3H2(g) ⇌ 2NH3(g), what happens to the equilibrium position if the pressure is increased?
  • A. Shifts to the left
  • B. Shifts to the right
  • C. No change
  • D. Depends on temperature
Q. For the reaction N2(g) + 3H2(g) ⇌ 2NH3(g), what happens to the equilibrium position if the volume of the container is decreased?
  • A. Equilibrium shifts to the left
  • B. Equilibrium shifts to the right
  • C. No change in equilibrium
  • D. Equilibrium shifts in both directions
Q. For the reaction: 3A(g) ⇌ 2B(g) + C(g), what is the expression for Kp?
  • A. (P_B^2 * P_C) / (P_A^3)
  • B. (P_A^3) / (P_B^2 * P_C)
  • C. (P_C) / (P_A^3)
  • D. (P_B^2) / (P_A^3)
Q. For the reaction: A(g) ⇌ B(g) + C(g), if the concentration of A is increased, what will happen to the equilibrium position?
  • A. Shift to the left
  • B. Shift to the right
  • C. No change
  • D. Depends on temperature
Q. If 0.1 M of a strong acid is mixed with 0.1 M of a strong base, what will be the resulting pH?
  • A. 0
  • B. 7
  • C. 14
  • D. 1
Q. If 0.1 M of a weak acid has a pH of 4.0, what is the Ka of the acid?
  • A. 1 x 10^-4
  • B. 1 x 10^-5
  • C. 1 x 10^-6
  • D. 1 x 10^-7
Q. If 50 mL of 0.1 M HCl is mixed with 50 mL of 0.1 M NaOH, what is the resulting pH?
  • A. 7
  • B. 1
  • C. 14
  • D. 0
Q. If a beam is supported at both ends and a load is applied at the center, what is the reaction force at each support?
  • A. Equal to the load
  • B. Half the load
  • C. Double the load
  • D. Zero
Q. If a force of 10 N is applied at an angle of 30 degrees to the horizontal, what is the horizontal component of the force?
  • A. 5 N
  • B. 8.66 N
  • C. 10 N
  • D. 0 N
Q. If the concentration of reactants is increased in a system at equilibrium, what will happen to the position of equilibrium?
  • A. Shift to the right
  • B. Shift to the left
  • C. No change
  • D. Depends on temperature
Q. If the equilibrium constant Kc for a reaction is 10 at a certain temperature, what is the value of Kc for the reverse reaction?
  • A. 0.1
  • B. 1
  • C. 10
  • D. 100
Q. If the equilibrium constant Kc for a reaction is 10, what can be said about the position of equilibrium?
  • A. Products are favored
  • B. Reactants are favored
  • C. Equilibrium is at the center
  • D. No conclusion can be drawn
Q. If the equilibrium constant Kc for a reaction is less than 1, what does it indicate about the equilibrium position?
  • A. Products are favored
  • B. Reactants are favored
  • C. Equal amounts of reactants and products
  • D. Reaction does not occur
Q. If the forward reaction is exothermic, what effect does increasing the temperature have on the equilibrium position?
  • A. Shifts to the right
  • B. Shifts to the left
  • C. No effect
  • D. Increases the rate of reaction
Q. In a closed system at equilibrium, if the pressure is increased, what will happen to the equilibrium position?
  • A. Shift to the side with more moles of gas
  • B. Shift to the side with fewer moles of gas
  • C. No change
  • D. Increase in temperature
Q. In a closed system at equilibrium, if the pressure is increased, what will happen to the equilibrium position if there are more moles of gas on the reactant side?
  • A. Shift to the right
  • B. Shift to the left
  • C. No change
  • D. Increase in temperature
Q. In a closed system at equilibrium, if the volume is decreased, what will happen to the equilibrium position?
  • A. Shift to the side with more moles of gas
  • B. Shift to the side with fewer moles of gas
  • C. No change
  • D. Increase in pressure
Q. In a closed system, if the volume is decreased, what will happen to the equilibrium of the reaction 2A(g) + B(g) ⇌ 3C(g)?
  • A. Shift to the left
  • B. Shift to the right
  • C. No change
  • D. Depends on temperature
Q. In a dynamic equilibrium, which of the following statements 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. The system is at rest
Q. In a reaction at equilibrium, if the concentration of a reactant is decreased, what will happen?
  • A. Shift to the right
  • B. Shift to the left
  • C. No change
  • D. Increase the rate of reaction
Q. In a reaction at equilibrium, if the concentration of products is decreased, what will happen?
  • A. Shift to the right
  • B. Shift to the left
  • C. No change
  • D. Depends on the temperature
Q. In a reaction at equilibrium, if the concentration of reactants is increased, what will happen to the equilibrium?
  • A. Shift to the right
  • B. Shift to the left
  • C. No change
  • D. Equilibrium constant increases
Q. In a reaction at equilibrium, if the concentration of reactants is increased, what will happen to the equilibrium position?
  • A. Shift to the right
  • B. Shift to the left
  • C. No change
  • D. Depends on the reaction
Q. In a reaction at equilibrium, if the temperature is decreased, what will happen to the equilibrium position if the reaction is exothermic?
  • A. Shift to the right
  • B. Shift to the left
  • C. No change
  • D. Depends on the concentration
Q. In a reaction at equilibrium, if the temperature is increased and the reaction is exothermic, what will happen to the equilibrium position?
  • A. Shift to the right
  • B. Shift to the left
  • C. No change
  • D. Equilibrium constant increases
Q. In a reaction at equilibrium, if the temperature is increased, what will happen to the equilibrium constant Kc for an endothermic reaction?
  • A. Increase
  • B. Decrease
  • C. No change
  • D. Depends on concentration
Q. In a solution of 0.1 M NH4Cl, what is the pH if the Kb of NH3 is 1.8 x 10^-5?
  • A. 4.75
  • B. 5.75
  • C. 6.75
  • D. 7.75
Q. In a static equilibrium problem, if the sum of clockwise moments equals the sum of counterclockwise moments, what can be concluded?
  • A. The object is in equilibrium
  • B. The object is accelerating
  • C. The object is in motion
  • D. The object is unstable
Q. In a system at equilibrium, if the concentration of reactants is increased, what will happen to the equilibrium position?
  • A. Shift to the right
  • B. Shift to the left
  • C. No change
  • D. Depends on temperature
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