Unit 3 Chemistry Chapter 6

Which factor does NOT affect the frequency and success of reactant particle collisions?

• Concentration

• Color of reactants

• Surface area

• Temperature

What role does a catalyst play in a chemical reaction?

• Increases the temperature

• Provides an alternative pathway with lower activation energy

• Decreases the surface area

• Increases the concentration of reactants

Which of the following is NOT a factor affecting the rate of a chemical reaction?

• Volume of the container

• Gas pressures

• Presence of a catalyst

• Activation energy

How does temperature affect the rate of a chemical reaction?

• It decreases the activation energy

• It increases the frequency of collisions

• It changes the orientation of molecules

• It decreases the concentration of reactants

What is represented using energy profile diagrams in the context of catalysts?

• The change in surface area

• The decrease in gas pressure

• The alternative reaction pathways

• The increase in temperature

What effect does increasing the concentration of reactants have on the rate of a chemical reaction?

• It changes the color of the reactants

• It decreases the rate of reaction

• It has no effect on the rate of reaction

• It increases the rate of reaction

Which of the following statements is true about activation energy in a chemical reaction?

• It is the energy required to start a reaction

• It is the energy released during a reaction

• It is the energy absorbed by the products

• It is the energy that decreases with temperature

How does a catalyst affect the equilibrium position of a reversible reaction?

• It shifts the equilibrium to the left

• It has no effect on the equilibrium position

• It increases the concentration of products

• It shifts the equilibrium to the right

What is the primary function of an enzyme in a biochemical reaction?

• To increase the temperature of the reaction

• To provide an alternative pathway with lower activation energy

• To decrease the concentration of reactants

• To change the color of the reactants

Which of the following factors can increase the rate of a chemical reaction?

• Decreasing the temperature

• Decreasing the surface area of reactants

• Increasing the activation energy

• Adding a catalyst