IGCSE Chemical Equilibrium Quiz

What is Le Chatelier's principle?

• A principle that explains the behavior of gases at high pressures

• A cooking technique used to prepare French cuisine

• A mathematical formula for calculating equilibrium constants

• Principle that describes how a system at equilibrium responds to changes in its conditions

When a system at equilibrium is subjected to a change, how does it respond according to Le Chatelier's principle?

• It shifts the equilibrium position to counteract the change.

• It reverses the change

• It accelerates the change

• It remains unchanged

If the concentration of a reactant is increased, according to Le Chatelier's principle, what will happen to the equilibrium position?

• The equilibrium position will remain unchanged.

• The equilibrium position will shift to the left.

• The equilibrium position will disappear.

• The equilibrium position will shift to the right.

If the temperature of a system at equilibrium is increased, what will be the effect on the equilibrium position?

• The equilibrium position will reverse

• The equilibrium position will remain the same

• The equilibrium position will disappear

• The equilibrium position will shift

What is the effect of adding a catalyst to a system at equilibrium, according to Le Chatelier's principle?

• It shifts the equilibrium to the left

• It slows down the attainment of equilibrium

• It has no effect on the equilibrium position

• It speeds up the attainment of equilibrium without affecting the equilibrium position.

In a reversible reaction, if the pressure is increased, what will be the effect on the equilibrium position?

• The equilibrium position will not be affected by the pressure change.

• The equilibrium position will shift towards the side with more solid reactants.

• The equilibrium position will shift towards the side with fewer moles of gas.

• The equilibrium position will shift towards the side with more moles of gas.

What is the effect of increasing the temperature on a system at equilibrium, according to Le Chatelier's principle?

• The equilibrium position will shift to the left

• The equilibrium position will remain unchanged

• The equilibrium position will disappear

• The equilibrium position will shift to the right

What happens to the equilibrium position in a reversible reaction when the concentration of products is increased?

• The equilibrium position will shift to the left

• The equilibrium position will remain unchanged

• The equilibrium position will disappear

• The equilibrium position will shift to the right

How does the addition of a catalyst affect the equilibrium position in a chemical reaction, according to Le Chatelier's principle?

• It shifts the equilibrium to the left

• It slows down the attainment of equilibrium

• It has no effect on the equilibrium position

• It speeds up the attainment of equilibrium without affecting the equilibrium position.