Chemical Reactions and Their Rates

What is the minimum amount of energy required to start a chemical reaction called?

• Activation Energy

• Potential Energy

• Reaction Energy

• Kinetic Energy

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

• Concentration

• Temperature

• Surface Area

• Color

How does an increase in temperature generally affect the rate of a chemical reaction?

• It slows down the reaction

• It has no effect

• It speeds up the reaction

• It stops the reaction

What happens to the particles of reactants when the temperature is increased?

• They move more quickly

• They stop moving

• They move more slowly

• They move at the same speed

What is concentration a measure of?

• The color of a solution

• The temperature of a solution

• The speed of particles

• The amount of one substance dissolved into another

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

• It increases the rate of reaction

• It stops the reaction

• It has no effect

• It decreases the rate of reaction

What is an inhibitor?

• A substance that stops a reaction

• A substance that has no effect on a reaction

• A substance that slows down a reaction

• A substance that speeds up a reaction

Which type of inhibitor decreases the rate of oxidation of metal?

• Enzyme inhibitor

• Reaction inhibitor

• Corrosive inhibitor

• Catalyst

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

• To stop the reaction

• To increase the activation energy

• To decrease the activation energy

• To slow down the reaction

Which of the following is an example of a catalyst in the human body?

• Sugar

• Enzymes

• Salt

• Water