Rates of Reaction Quiz
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5 questions, one answer each
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1. Which of these increases the rate of a reaction?
- A. Decreasing concentration
- B. Increasing surface area of a solid reactant
- C. Decreasing temperature
- D. Removing the catalyst
2. What is the minimum energy particles need to react called?
- A. Bond energy
- B. Activation energy
- C. Kinetic energy
- D. Enthalpy change
3. How does increasing temperature increase rate of reaction, according to collision theory?
- A. It only increases collision frequency
- B. It only increases the proportion of particles with sufficient energy
- C. It increases both collision frequency and the proportion of collisions with energy above the activation energy
- D. It has no effect on collisions
4. A student adds manganese(IV) oxide to hydrogen peroxide and observes rapid bubbling, but recovers the same mass of manganese(IV) oxide afterwards. What does this show?
- A. Manganese(IV) oxide is a reactant that gets used up
- B. Manganese(IV) oxide is acting as a catalyst
- C. The reaction did not actually occur
- D. Manganese(IV) oxide is a product of the reaction
5. On a reaction profile diagram, how does adding a catalyst change the diagram?
- A. It raises the activation energy and changes ΔH
- B. It lowers the activation energy but leaves ΔH unchanged
- C. It changes ΔH but leaves activation energy unchanged
- D. It has no effect on the diagram at all