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What kind of reaction does the conversion of A to B represent? What kind of reaction does the conversion of A to B represent? A) Addition reaction B) Substitution reaction C) Elimination reaction D) Acid-base reaction


A) Addition reaction
B) Substitution reaction
C) Elimination reaction
D) Acid-base reaction

E) B) and D)
F) B) and C)

Correct Answer

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Which of the following statements is true?


A) Bond dissociation energies increase down a column of the periodic table.
B) When DH° is positive,more energy is released in forming bonds than is needed to break bonds.
C) When DH° is negative,more energy is needed to break bonds than is released in forming bonds.
D) Bond dissociation energies decrease down a column of the periodic table.

E) A) and B)
F) A) and C)

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The DG° (free energy change) for the conversion of A to B is predicted to be which of the following? The DG° (free energy change) for the conversion of A to B is predicted to be which of the following? A) DG° = 0 B) DG° < 0 C) DG° > 0 D) Cannot be determined from the information provided


A) DG° = 0
B) DG° < 0
C) DG° > 0
D) Cannot be determined from the information provided

E) C) and D)
F) B) and D)

Correct Answer

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What type of bond cleavage takes place in/what type of intermediate is produced in the following reaction? What type of bond cleavage takes place in/what type of intermediate is produced in the following reaction? A) Homolysis/Radical B) Homolysis/Carbocation C) Heterolysis/Carbocation D) Heterolysis/Carbanion


A) Homolysis/Radical
B) Homolysis/Carbocation
C) Heterolysis/Carbocation
D) Heterolysis/Carbanion

E) A) and B)
F) A) and C)

Correct Answer

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The symbol Δ stands for ________ in a chemical reaction.


A) light
B) heat
C) reactant
D) product

E) B) and C)
F) A) and C)

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Which of the following statements is true?


A) Ionic intermediates are formed in radical reactions.
B) Radicals are intermediates in polar reactions.
C) Carbocations are electrophiles.
D) Radicals are nucleophiles.

E) A) and B)
F) None of the above

Correct Answer

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Which reaction has a positive DG°,assuming that entropy changes are negligible compared to enthalpy changes? Which reaction has a positive DG°,assuming that entropy changes are negligible compared to enthalpy changes? A) A B) B C) C


A) A
B) B
C) C

D) A) and B)
E) A) and C)

Correct Answer

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How many transition states and intermediates would the reaction profile have for the reaction shown below? How many transition states and intermediates would the reaction profile have for the reaction shown below? A) Three transition states and three intermediates B) Two transition states and two intermediates C) Three transition states and two intermediates D) Two transition states and three intermediates


A) Three transition states and three intermediates
B) Two transition states and two intermediates
C) Three transition states and two intermediates
D) Two transition states and three intermediates

E) None of the above
F) B) and D)

Correct Answer

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Which step would most likely have the largest energy of activation? Which step would most likely have the largest energy of activation? A) Step one B) Step two C) Step three D) It cannot be determined from the information provided


A) Step one
B) Step two
C) Step three
D) It cannot be determined from the information provided

E) None of the above
F) C) and D)

Correct Answer

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Which of the Keq corresponds to the highest value of DG°?


A) Keq = 10-1
B) Keq = 10-2
C) Keq = 10-3
D) Keq = 10-5

E) B) and C)
F) A) and D)

Correct Answer

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Which of the following statements is true?


A) The product is favored in reaction in which DH° is a positive value.
B) Entropy decreases when an acyclic compound forms a ring.
C) In homolytic bond cleavage,entropy decreases and favors formation of products.
D) The starting material is favored in a reaction in which DH° is a negative value.

E) C) and D)
F) A) and B)

Correct Answer

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For which of the following reactions is ΔS° a positive value? For which of the following reactions is ΔS° a positive value? A) I B) II C) III D) IV


A) I
B) II
C) III
D) IV

E) All of the above
F) B) and D)

Correct Answer

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Which of the following statements about the equilibrium constant,Keq,is true?


A) When Keq > 1,the equilibrium favors the reactants.
B) When Keq < 1,the equilibrium favors the products.
C) The size of Keq tells about the position of equilibrium.
D) For a reaction to be useful,the equilibrium must favor the reactants.

E) None of the above
F) All of the above

Correct Answer

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