C2- Rates and energy

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1. What is an Exothermic reaction?

  • A reaction where gas is given off
  • A reaction where the reactants are used up
  • A reaction where heat energy is given out
  • A reaction where heat energy is taken in
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Other questions in this quiz

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

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

3. 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

4. What increases the rate of a reaction?

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

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

  • The rate of reaction increases
  • The rate of reaction decreases
  • No change
  • The reaction expands


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