Worksheet: The Collision Theory

In this worksheet, we will practice explaining the principles of collision theory and how temperature, pressure, and concentration affect reaction rate.

Q1:

Collision theory states that chemical reactions occur when particles (for example, atoms or molecules) collide. Which of the following, according to collision theory, does not play a part in determining the rate of a reaction?

  • A The activation energy for the reaction
  • B The energy with which particles collide
  • C The number of particles analyzed
  • D The frequency with which particles collide

Q2:

Which one of the following would not increase the rate of a reaction, according to collision theory?

  • A Increasing the temperature
  • B Increasing the pressure
  • C Using a differently shaped container with the same volume
  • D Increasing the surface area of particles
  • E Using a catalyst

Q3:

Which one of the following would not increase the rate of a reaction, according to collision theory?

  • A Particles colliding more frequently
  • B A higher particle concentration
  • C A higher temperature
  • D Particles having more energy
  • E A higher activation energy

Q4:

When two reactive particles collide, there are many factors that affect whether a reaction will occur.

Which of the following factors does not have an effect?

  • AThe temperature
  • BThe orientations of particles
  • CThe activation energy
  • DThe energy of the collision
  • EThe number of products

Q5:

When lightning strikes, molecules of oxygen ( O ) 2 and nitrogen ( N ) 2 in the atmosphere are given enough energy to combine together to form nitric oxide ( N O ) . Under normal conditions, oxygen and nitrogen molecules collide but do not react. What does this suggest about the reaction?

  • AIt has a very large activation energy.
  • BIt is irreversible.
  • CIt is reversible.
  • DIt is catalyzed by lightning.
  • EIt cannot be performed without a catalyst.

Q6:

For a simple reaction between gases A and B , which of the following temperatures will give the highest reaction rate?

  • A 7 5 C
  • B 2 5 C
  • C 5 0 C
  • D 1 0 0 C
  • E 0 C

Q7:

When a reaction mixture is heated, the particles collide more frequently. Which of the following is the best explanation of this effect?

  • A The particles break apart.
  • B The particles exert stronger attractive forces.
  • C The particles move faster.
  • D The particles get larger.
  • E The particles get closer together.

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