Chemical Kinetics Quiz

What is the role of a catalyst in a chemical reaction?

• A. It increases the activation energy

• D. It is consumed by the reaction

• B. It decreases the rate of the net reaction

• C. It provides a new reaction pathway with a lower activation energy

What is the overall order of a reaction if the rate law is Rate = k[A]^2[B]?

• D. 4

• A. 1

• C. 3

• B. 2

What is the half-life of a reactant if its concentration falls by a factor of 0.5 every 19 hours?

• C. 38 hours

• A. 9.5 hours

• D. 57 hours

• B. 19 hours

What is the purpose of a homogeneous catalyst in a reaction?

• D. To be in a different phase than the reacting species

• C. To provide a new reaction pathway with a lower activation energy

• B. To be consumed by the reaction

• A. To increase the activation energy

What is the activation energy of a reaction if the slope of the plot of lnk versus 1/T is -5000 K?

• A. 5000 J/mol

• B. 10000 J/mol

• C. 20000 J/mol

• D. 50000 J/mol

What is the primary function of a catalyst in an industrial application?

• D. To be selective

• C. To increase the rate of the net reaction

• B. To be consumed by the reaction

• A. To have a low turnover number

What is the order of the reaction if the rate law is Rate = k[A]?

• D. 3

• C. 2

• B. 1

• A. 0

What is the purpose of a heterogeneous catalyst in a reaction?

• A. To be in the same phase as the reacting species

• B. To be consumed by the reaction

• C. To provide a new reaction pathway with a lower activation energy

• D. To be selective

What is the overall order of a reaction if the rate law is Rate = k[A]^2?

• A. 1

• B. 2

• C. 3

• D. 4

What is the purpose of a reactive intermediate in a reaction mechanism?

• D. To account for the way reactants become products

• C. To provide a new reaction pathway with a lower activation energy

• B. To increase the rate of the net reaction

• A. To be consumed by the reaction