Collision theory and activation energy Quiz
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5 questions, one answer each
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1. What is activation energy?
- A. The energy released by the reaction
- B. The total energy of all the particles
- C. The minimum energy needed for a successful collision
- D. The energy of a catalyst
2. Which change increases collision frequency without changing the energy of the particles?
- A. Increasing the concentration
- B. Raising the temperature
- C. Adding a catalyst
- D. Heating the mixture
3. How does a catalyst increase the rate?
- A. It makes the particles move faster
- B. It is used up to make more product
- C. It increases the concentration
- D. It provides an alternative pathway with a lower activation energy
4. Why do enzymes stop working at high temperatures?
- A. They are used up
- B. They are denatured, so the active site changes shape
- C. They become more concentrated
- D. They gain too little energy
5. Which is an example of a catalyst used in industry?
- A. Nitrogen in the Haber process
- B. Hydrogen in the Haber process
- C. Iron in the Haber process
- D. Ammonia in the Haber process