Rates of Reaction keyfacts 1 quiz

What is the rate of a reaction?

• The time taken for a reaction to start

• A measure of how quickly a reactant is used up or a product is formed

• The temperature at which a reaction occurs

• The energy required to start a reaction

What is a successful collision?

• A collision that produces a reaction

• A collision that does not produce a reaction

• A collision that occurs at low energy

• A collision that occurs at high temperature

What is activation energy?

• The energy released during a reaction

• The minimum amount of energy needed for a collision to be successful

• The energy required to break bonds

• The energy required to form bonds

How can the rate of reaction be measured?

• By measuring the temperature change of the reaction

• By measuring the color change of the reactants

• By measuring the pH change of the solution

• By measuring the change in mass or volume of reactants or products

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

• It stops the reaction

• It has no effect on the rate of reaction

• It decreases the rate of reaction

• It increases the rate of reaction

What happens to the rate of reaction when the surface area to volume ratio is increased?

• The rate of reaction remains the same

• The reaction stops

• The rate of reaction decreases

• The rate of reaction increases

How does temperature affect the rate of reaction?

• Temperature stops the reaction

• Temperature has no effect on the rate of reaction

• Increasing temperature decreases the rate of reaction

• Increasing temperature increases the rate of reaction

What is a catalyst?

• A substance that increases the rate of a reaction without being consumed

• A substance that decreases the rate of a reaction

• A substance that stops a reaction

• A substance that changes the products of a reaction

What is the role of enzymes in reactions?

• They increase the temperature of reactions

• They act as biological catalysts

• They decrease the pressure of reactions

• They change the color of reactants

What is the effect of a catalyst on activation energy?

• It stops the reaction

• It has no effect on activation energy

• It increases the activation energy

• It provides an alternative pathway with lower activation energy