Chemical Kinetics Worksheet With Answers By Prof. Abdullah M. Asiri - 2009 Page 20
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33August 16, 2009
[PROBLEM SET FROM R. CHANG TEST
BANK]
69. The gas phase reaction of nitrogen dioxide and carbon monoxide was found by experiment to be second-
order with respect to NO
, and zeroth-order with respect to CO below 25°C.
2
+ CO → NO + CO
NO
2
2
Which one of the following mechanisms is consistent with the observed reaction order?
A.
B.
C.
D.
70. Which of the following statements is false?
A.
A catalyst increases the rate of the forward reaction, but does not alter the reverse rate.
B.
A catalyst alters the mechanism of reaction.
C.
A catalyst alters the activation energy.
D.
A catalyst may be altered in the reaction, but is always regenerated.
E.
A catalyst increases the rate of reaction, but is not consumed.
71. Complete the following statement: A catalyst
A.
increases the activation energy.
B.
alters the reaction mechanism.
C.
increases the average kinetic energy of the reactants.
D.
increases the concentration of reactants.
E.
increases the collision frequency of reactant molecules.
20
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