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Which of the following describes the effect of a catalyst on a reaction?


A) It lowers the free energy of the products.
B) It makes the reactants less stable.
C) It changes the equilibrium constant.
D) It lowers the energy of activation.

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Which of the following is the most likely structure of the following cation after rearrangement? Which of the following is the most likely structure of the following cation after rearrangement? A) B) C) D)


A) Which of the following is the most likely structure of the following cation after rearrangement? A) B) C) D)
B) Which of the following is the most likely structure of the following cation after rearrangement? A) B) C) D)
C) Which of the following is the most likely structure of the following cation after rearrangement? A) B) C) D)
D) Which of the following is the most likely structure of the following cation after rearrangement? A) B) C) D)

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Based on the following energy diagram, is the reaction exothermic or endothermic? Based on the following energy diagram, is the reaction exothermic or endothermic?

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exothermic

For the following reaction step, indicate which pattern of arrow pushing it represents. For the following reaction step, indicate which pattern of arrow pushing it represents.

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Identify the nucleophilic centers in the following molecule. Identify the nucleophilic centers in the following molecule.

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Predict the sign of Δ\Delta S of the following reaction. Predict the sign of \Delta S of the following reaction. A) positive B) negative C) no change


A) positive
B) negative
C) no change

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Given the following rate law, what is the order of the reaction with respect to sodium cyanide? Given the following rate law, what is the order of the reaction with respect to sodium cyanide?

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Consider the following reaction. What patterns of arrow pushing are likely involved in the formation of the product? Would you expect the Δ\Delta S for the reaction to be positive or negative? Consider the following reaction. What patterns of arrow pushing are likely involved in the formation of the product? Would you expect the \Delta S for the reaction to be positive or negative?

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Proton transfer and ...

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Predict the sign of Δ\Delta S of the following reaction. Predict the sign of \Delta S of the following reaction.

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Draw the structure of the most likely following cation after it has rearranged. Draw the structure of the most likely following cation after it has rearranged.

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Predict the sign of Δ\Delta G for an endothermic reaction with an increase in entropy.


A) positive
B) negative
C) no change
D) cannot predict without additional information

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What type of bond cleavage does the following reaction involve? What type of bond cleavage does the following reaction involve?

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Consider the product of the following mechanism. How many distinct resonances would appear in the (proton-decoupled) 13C NMR spectrum for the product? Consider the product of the following mechanism. How many distinct resonances would appear in the (proton-decoupled) <sup>13</sup>C NMR spectrum for the product? A) 2 B) 3 C) 4 D) 5


A) 2
B) 3
C) 4
D) 5

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Identify the electrophilic site in the following molecule. Identify the electrophilic site in the following molecule.

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11eab459_a6d5_318a_acdb_7f19b0163dbd_TB3185_00

Which of the following mechanistic steps represents a nucleophilic attack?


A) Which of the following mechanistic steps represents a nucleophilic attack? A) B) C) D)
B) Which of the following mechanistic steps represents a nucleophilic attack? A) B) C) D)
C) Which of the following mechanistic steps represents a nucleophilic attack? A) B) C) D)
D) Which of the following mechanistic steps represents a nucleophilic attack? A) B) C) D)

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Identify the sequence of curved arrows (electron movement) in the steps of the following reaction. Identify the sequence of curved arrows (electron movement) in the steps of the following reaction. A) Proton transfer, proton transfer B) Proton transfer, loss of leaving group C) Nucleophilic attack, proton transfer D) Proton transfer, nucleophilic attack


A) Proton transfer, proton transfer
B) Proton transfer, loss of leaving group
C) Nucleophilic attack, proton transfer
D) Proton transfer, nucleophilic attack

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Which of the following energy diagrams is of a reaction with one transition state?


A) Which of the following energy diagrams is of a reaction with one transition state? A) B) C) D)
B) Which of the following energy diagrams is of a reaction with one transition state? A) B) C) D)
C) Which of the following energy diagrams is of a reaction with one transition state? A) B) C) D)
D) Which of the following energy diagrams is of a reaction with one transition state? A) B) C) D)

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A

Will the following cation undergo rearrangement? Will the following cation undergo rearrangement?

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What is wrong with the following mechanism? What is wrong with the following mechanism? A) There is no leaving group, so there should be no arrows. B) The arrow should be removing a proton from the H<sub>2</sub>O group. C) An arrow is also needed to indicate the loss of the leaving group. D) The arrow is backwards.


A) There is no leaving group, so there should be no arrows.
B) The arrow should be removing a proton from the H2O group.
C) An arrow is also needed to indicate the loss of the leaving group.
D) The arrow is backwards.

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Which of the following energy diagrams is of a reaction with one intermediate?


A) Which of the following energy diagrams is of a reaction with one intermediate? A) B) C) D)
B) Which of the following energy diagrams is of a reaction with one intermediate? A) B) C) D)
C) Which of the following energy diagrams is of a reaction with one intermediate? A) B) C) D)
D) Which of the following energy diagrams is of a reaction with one intermediate? A) B) C) D)

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