Reaction Rate and Influencing Factors Quiz

What is the definition of reaction rate?

• The increase in concentration of products over time

• The amount of energy released during a reaction

• The decrease in concentration of reactants over time

• The speed of a chemical reaction

What unit is commonly used to express reaction rate?

• mol/L

• g/cm³

• L/min

• M/s

What does the order of reaction indicate?

• The total number of reactants

• The speed of the reaction

• The relationship between concentration and reaction rate

• The energy change during the reaction

Which factor does NOT affect the rate of reaction?

• Surface area

• Temperature

• Concentration

• Color of the reactants

What happens to the reaction rate when temperature increases?

• It decreases

• It remains the same

• It increases

• It becomes unpredictable

What is the effect of increasing concentration on reaction rate?

• It increases the rate

• It stops the reaction

• It has no effect

• It decreases the rate

What is a catalyst?

• A product of a chemical reaction

• A reactant that is used up in the reaction

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

• A substance that slows down a reaction

Which of the following describes an effective collision?

• Collisions that occur at high temperatures

• Collisions that do not lead to a reaction

• Collisions that have the correct orientation and energy

• Collisions that happen frequently

What is the relationship between reaction rate and time?

• They are directly proportional

• They are equal

• They are inversely proportional

• They are unrelated

What is the effect of surface area on reaction rate?

• Surface area has no effect

• Smaller surface area increases the rate

• Larger surface area decreases the rate

• Larger surface area increases the rate