Reactions

What happens to the concentration of reactants and products at equilibrium?

• It fluctuates constantly.

• It remains constant.

• Reactants disappear while products increase.

• Products decrease while reactants increase.

At equilibrium, what happens to the rates of the forward and reverse reactions?

• The rate of the forward reaction is faster than the reverse.

• The rate of the reverse reaction is faster than the forward.

• The rates of both reactions are equal.

• Both reactions stop.

At equilibrium, what can be observed in a closed system?

• • A continuous change in the amounts of reactants and products.

• No visible change in the amounts of reactants and products

• Only reactants are present.

• Only products are present.

Which type of reactions can reach equilibrium?

• Irreversible reactions only.

• Reactions that take place in open systems.

• Reversible reactions only.

• Reactions that occur under high pressure.

What can affect the position of equilibrium?

• Temperature and pressure.

• The colour of the system.

• The size of the container.

• The type of catalyst used.

In which type of system can chemical equilibrium be established?

• Only in an open system.

• Only in a closed system.

• In any type of system.

• Only in systems with high temperatures.

What can change the position of equilibrium?

• Adding a catalyst.

• Changing the concentration of reactants or products, temperature, or pressure

• Increasing the volume of the container.

• No factors can change the position of equilibrium.

What happens in a system at equilibrium?

• Only the forward reaction takes place.

• • Only the reverse reaction takes place.

• • Both the forward and reverse reactions occur at the same time.

• Neither the forward nor the reverse reaction takes place.

Is equilibrium always at the half-way point?

• Yes, equilibrium always occurs at the half-way point.

• No, equilibrium depends on the concentrations of reactants and products.

• Yes, it’s always the same for any reaction.

• No, equilibrium is never reached.

Which of the following best describes a reversible reaction?

• A reaction that only goes in one direction.

• A reaction where reactants are always converted to products.

• A reaction where products can be converted back into reactants.

• A reaction that occurs only at high temperatures.