• Question 01:

    Which of the following is a rate law, where the units of rate are equal to the units of the rate constant?

  • Question 02:

    Which answer choice correctly matches the integrated rate law shown below?

    1/[A]t = k t + 1/[A]0

  • Question 03:

    A proposed mechanism for a given chemical reaction is given below.

    STEP 1 (fast) A + B → J
    STEP 2 (slow) J + A → C + F
    STEP 3 (fast) F + A → C + D

    Which combination of statements is consistent with the data above?

  • Questions 04-06:

    Questions 4-6 relate to the popular demonstration called “Elephant’s Toothpaste”, in which the mechanism is believed to be as follows.

    STEP 1 H2O2 + I- → H2O + OI-
    STEP 2 H2O2 + OI- → H2O + O2 + I-

    Question 04:

    Which species is the catalyst in the reaction?

  • Question 05:

    Which species is an intermediate?

  • Question 06:

    Which chemical equation consistent with the mechanism provided?

  • Questions 07-10:

    A reaction of the reactants A and B, to produce products X and Y, can be summarized as;

    3A + 2B → 2X + Y

    The kinetics of the reaction are studied and data collected. Use the data in the table below to answer Questions 07-10.

    Question 07:

    What is the rate law for the reaction?

  • Question 08:

    What is the value of the rate constant (with correct units)?

  • Question 09:

    In experiment 3, what would be the rate of change of concentration of B measured in M sec-1?

  • Question 10:

    If Z is an intermediate, which of the following is a possible slow step in the mechanism?