C2- Rates and energy

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1. What happens when the surface area of a solid is increased?

  • The reaction expands
  • The rate of reaction increases
  • No change
  • The rate of reaction decreases
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2. How does a catalyst increase the rate of reaction?

  • Increases the energy of the reaction
  • Makes the particles move faster
  • Lowers the activation energy
  • Pushes the particles closer together

3. Which of the following statements about collisions is correct?

  • Only fast-moving particles collide with each other
  • Reactions can happen if the colliding particles have enough energy
  • All colliding particles have the same amount of energy
  • Collisions only happen if there is heat

4. What increases the rate of a reaction?

  • Pressure
  • Temperature
  • Surface area
  • Concentration
  • All of the ones stated
  • None of the ones stated

5. A successful collision is one in which:

  • Enough energy is transferred for particles to react
  • The particles hit each other
  • Enough energy is transferred for particles to bounce off each other
  • Particles bounce off each other

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