Le Chatelier's Principle Quiz

What is the term used to describe a system where reactants and products are formed at the same rate?

• Physical Equilibrium

• Dynamic Equilibrium

• Static Equilibrium

• Chemical Equilibrium

If the concentration of a reactant is increased, in which direction will the equilibrium shift?

• Towards the reactants

• Towards the products

• No shift

• Towards the side with more moles

What happens to the equilibrium position when the concentration of a pure solid is changed?

• Shifts towards the reactants

• Shifts towards the products

• No change

• Shifts towards the side with fewer moles

How does increasing the temperature affect an endothermic reaction at equilibrium?

• Shifts towards the side with fewer moles

• No shift

• Shifts towards the products

• Shifts towards the reactants

In an exothermic reaction, what is the effect of decreasing the temperature on the equilibrium position?

• Shifts towards the side with more moles

• No shift

• Shifts towards the products

• Shifts towards the reactants

What happens to the equilibrium position when the pressure is increased in a reaction with more gas molecules on the right?

• Shifts towards the side with more moles

• No shift

• Shifts to the right

• Shifts to the left

How does decreasing the volume of the reaction vessel affect the equilibrium position?

• Shifts towards the side with fewer moles

• No shift

• Shifts towards the side with more moles

• Shifts towards the products

What is the effect of adding a catalyst on the equilibrium position?

• Shifts towards the reactants

• Shifts towards the products

• Shifts towards the side with fewer moles

• No change

When an inert gas is added at constant pressure, what happens to the equilibrium position?

• Shifts towards the side with more moles

• Shifts towards the reactants

• Shifts towards the products

• No change

Which of the following stresses does not affect the equilibrium position?

• Concentration

• Catalyst

• Temperature

• Pressure