• Question 01:

    Which of the following best describes the action of a catalyst and how a reaction rate is increased when one is present?

  • Question 02:

    The reaction mechanism below shows the destruction of ozone in the earth's atmosphere.

    Step 1: Cl(g) + O3(g) → ClO(g) + O2(g)
    Step 2: ClO(g) + O(g) → Cl(g) + O2(g)

    Which species is the catalyst, and how can it by identified?

  • Question 03:

    Which of the following is not a characteristic of a catalyst?

  • Question 04:

    On the diagram shown below, which of the values are affected by the addition of a catalyst?

  • Question 05:

    What happens when a catalyst is added to an equilibrium mixture?

  • Question 06:

    A few drops of sulfuric acid are observed to increase the rate of a reaction between a liquid alcohol and a liquid carboxylic acid, whereas a transition metal catalyst does the same in the case of the production of ammonia gas from nitrogen and hydrogen gases. Which statement best describes these observations?

  • Question 07:

    Based purely on a set of elementary steps that make up a reaction mechanism, how might one recognize a catalyst?

  • Question 08:

    When enzymes are used to catalyze substrates in biological reactions, the rate of product formation is often found to ultimately plateau. Which explanation would NOT account for this observation?

  • Question 09:

    When a reversible reaction is exposed to a catalyst, which statement correctly summarizes the change in the rate of the forward and backward reactions?

  • Question 10:

    In the following mechanism, what is the catalyst?

    A + B → C + D
    C + A → B + D