Le Chatelier’s Principle
Chemistry ⇒ Chemical Kinetics and Equilibrium
Le Chatelier’s Principle starts at 11 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Le Chatelier’s Principle.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 11
Describe the effect of decreasing the volume of a container on a gaseous equilibrium where the number of moles of gas is greater on the reactant side.
Describe the effect of increasing the concentration of a product in a reversible reaction at equilibrium.
Describe what happens to the equilibrium position if both reactant and product concentrations are increased equally.
Describe what happens to the equilibrium position when an inert gas is added to a reaction mixture at constant volume.
Describe the effect of decreasing the volume of a container on a gaseous equilibrium where the number of moles of gas is greater on the reactant side.
For the reaction: 2A(g) ⇌ B(g) + C(g), if the total pressure is increased, what will happen to the equilibrium position?
For the reaction: 2NO(g) + O2(g) ⇌ 2NO2(g), what will happen if the temperature is increased, given that the reaction is exothermic?
For the reaction: 2NO2(g) ⇌ N2O4(g), what will happen if the temperature is decreased, given that the reaction is exothermic?
If the forward reaction is exothermic, increasing the temperature will: (1) Increase product formation (2) Decrease product formation (3) Have no effect (4) Increase reactant formation
When the concentration of a reactant is increased in a system at equilibrium, the equilibrium will shift to: (1) The right (2) The left (3) Remain unchanged (4) None of these
Which direction will the equilibrium shift if the pressure is decreased in the reaction: 2NO2(g) ⇌ N2O4(g)? (1) To the right (2) To the left (3) No change (4) Cannot be determined
Which of the following changes will NOT affect the position of equilibrium? (1) Change in concentration (2) Change in temperature (3) Addition of a catalyst (4) Change in pressure
Fill in the blank: According to Le Chatelier’s Principle, if a system at equilibrium is subjected to a change in conditions, the system will adjust to _______ the effect of the change.
Fill in the blank: Le Chatelier’s Principle helps to predict the _______ of equilibrium when conditions are changed.
Fill in the blank: Le Chatelier’s Principle is useful in predicting the effect of _______ changes on equilibrium systems.
Fill in the blank: The addition of a catalyst to a system at equilibrium will _______ the rate at which equilibrium is achieved.
True or False: Increasing the temperature of an exothermic reaction at equilibrium will shift the equilibrium to the left.
True or False: Le Chatelier’s Principle applies only to chemical equilibria in gaseous systems.
True or False: Le Chatelier’s Principle can be applied to both homogeneous and heterogeneous equilibria.
True or False: Le Chatelier’s Principle can be used to predict the effect of changing the amount of a solid in a heterogeneous equilibrium.
