68 . Which of the following statements does not accurately describe the action of a catalyst?
(A) A catalyst causes a reaction to proceed at a faster rate.
(B) A catalyst lowers the activation energy of a reaction.
(C) A catalyst affects the rate of both the forward and the reverse reaction.
(D) A catalyst increases the rate constant of a reaction.
(E) A catalyst increases the equilibrium constant of a reaction.
69 . A possible mechanism for the reaction of carbon monoxide with nitrogen dioxide is
Which of the following could be the rate law for this reaction?
(A) Rate = k[NO 2 ]
(B) Rate = k[NO 2 ]^2
(C) Rate = k[NO 3 ] [CO]
(D) Rate = k[NO 3 ][CO][NO 2 ]^2
(E) Rate = k[NO][NO 3 ]/[NO 2 ]^2
IF YOU FINISH BEFORE TIME IS CALLED, YOU MAY CHECK YOUR WORK ON THIS
SECTION ONLY. DO NOT TURN TO ANY OTHER SECTION IN THE TEST.
STOP
