Understanding Reaction Rate Factors

How does increasing the temperature generally affect the rate of a chemical reaction?

• It decreases the rate of reaction.

• It has no effect on the rate of reaction.

• It increases the rate of reaction.

• It stops the reaction completely.

Which of the following statements is true about the concentration of reactants and the rate of reaction?

• Increasing the concentration of reactants decreases the rate of reaction.

• Increasing the concentration of reactants has no effect on the rate of reaction.

• Increasing the concentration of reactants increases the rate of reaction.

• Decreasing the concentration of reactants increases the rate of reaction.

How does increasing the surface area of a solid reactant affect the rate of reaction?

• It decreases the rate of reaction.

• It has no effect on the rate of reaction.

• It increases the rate of reaction.

• It stops the reaction completely.

What is the role of a catalyst in a chemical reaction?

• It decreases the rate of reaction.

• It increases the rate of reaction.

• It has no effect on the rate of reaction.

• It stops the reaction completely.

Which of the following is an example of an inhibitor in a chemical reaction?

• A substance that increases the rate of reaction.

• A substance that decreases the rate of reaction.

• A substance that has no effect on the rate of reaction.

• A substance that stops the reaction completely.

How does increasing the pressure affect the rate of reaction for gases?

• It decreases the rate of reaction.

• It has no effect on the rate of reaction.

• It increases the rate of reaction.

• It stops the reaction completely.

Which of the following factors does NOT affect the rate of reaction?

• Temperature

• Concentration of reactants

• Colour of reactants

• Surface area of reactants

What is the effect of the nature of reactants on the rate of reaction?

• Some reactants react faster than others.

• All reactants react at the same rate.

• The nature of reactants has no effect on the rate of reaction.

• The nature of reactants stops the reaction completely.

Which of the following is true about the effect of temperature on the rate of reaction?

• Higher temperatures always slow down reactions.

• Lower temperatures always speed up reactions.

• Higher temperatures generally speed up reactions.

• Temperature has no effect on the rate of reaction.

How does the presence of a catalyst affect the activation energy of a reaction?

• It increases the activation energy.

• It decreases the activation energy.

• It has no effect on the activation energy.

• It stops the reaction completely.