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Identify the acid/conjugate acid (in that order) in the following reaction: Identify the acid/conjugate acid (in that order) in the following reaction: A) I,III B) I,IV C) II,III D) II,IV


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

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

Correct Answer

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Consider the following structures I-IV.Which two species represent resonance structures? Consider the following structures I-IV.Which two species represent resonance structures? A) I and II B) I and III C) I and IV D) II and IV


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

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

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Which of the following statements about Brønsted-Lowry acids and bases is true?


A) Loss of a proton from a base forms its conjugate acid.
B) Loss of a proton from an acid forms its conjugate base.
C) Gain of a proton by an acid forms its conjugate base.
D) Brønsted-Lowry acid-base reactions always result in the transfer of a proton from a base to an acid.

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

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Which of the following compounds is not a Lewis acid?


A) AlCl3
B) HCl
C) H2O
D) CBr4

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

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Consider the following structures I-IV.Which two species represent a conjugate acid-base pair? Consider the following structures I-IV.Which two species represent a conjugate acid-base pair? A) I and II B) I and III C) I and IV D) II and III


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

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

Correct Answer

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Which of the following would have the lowest pKa?


A) ClCH2CH2CH2CH2COOH
B) CH3CHClCH2CH2COOH
C) CH3CH2CHClCH2COOH
D) CH3CH2CH2CHClCOOH

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

Correct Answer

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Which of the following species is the conjugate acid of ammonia,NH3?


A) H4N
B) H3N+
C) H2N-
D) H4N+

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

Correct Answer

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What is the electrophilic site in the following compounds? What is the electrophilic site in the following compounds? A) I = Carbon; II = carbon; III = boron. B) I = Chlorine; II = carbon; III = boron. C) I = Carbon; II = oxygen; III = boron. D) I = Carbon; II = carbon; III = fluorine.


A) I = Carbon; II = carbon; III = boron.
B) I = Chlorine; II = carbon; III = boron.
C) I = Carbon; II = oxygen; III = boron.
D) I = Carbon; II = carbon; III = fluorine.

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

Correct Answer

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Which of the following species can be both Lewis acid and Lewis base? Which of the following species can be both Lewis acid and Lewis base? A) I,III,IV B) I,II,IV C) II,III,IV D) I,II,III


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

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

Correct Answer

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Rank the following compounds in order of increasing acidity,putting the least acidic first. Rank the following compounds in order of increasing acidity,putting the least acidic first. A) III < I < IV < II B) III < IV < I < II C) II < I < IV < III D) III < I < II < IV


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

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

Correct Answer

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Which of the following species is the strongest base?


A) HO-
B) H2N-
C) CH3COO-
D) Cl-

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

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Rank the following compounds in order of decreasing acidity,putting the most acidic first. Rank the following compounds in order of decreasing acidity,putting the most acidic first. A) IV > II > III > I B) III > II > IV > I C) I > II > IV > III D) III > IV > II > I


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

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

Correct Answer

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Which of the following statements is a correct definition for a Brønsted-Lowry acid?


A) Proton acceptor
B) Electron pair donor
C) Electron pair acceptor
D) Proton donor

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

Correct Answer

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Which of the following species is the conjugate base of methanol,CH3OH?


A) CH3OH2+
B) CH3O-
C) CH3-
D) CH4

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

Correct Answer

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Rank the following compounds in order of decreasing acidity,putting the most acidic first. Rank the following compounds in order of decreasing acidity,putting the most acidic first. A) I > II > III B) III > II > I C) II > III > I D) III > I > II


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

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

Correct Answer

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Which of the following statements about a Brønsted-Lowry base is true?


A) The net charge may be zero,positive,or negative.
B) All Brønsted-Lowry bases contain a lone pair of electrons or a π bond.
C) All Brønsted-Lowry bases contain a proton.
D) The net charge may be zero or positive.

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

Correct Answer

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Which of the following ranks the compounds in order of increasing basicity,putting the least basic first?


A) CH3NH2 < CH3OH < CH4
B) CH3OH < CH3NH2 < CH4
C) CH4 < CH3NH2 < CH3OH
D) CH4 < CH3OH < CH3NH2

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

Correct Answer

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Which is the conjugate acid in the following reaction? Which is the conjugate acid in the following reaction? A) I B) II C) III D) IV


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

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

Correct Answer

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Which of the following statements explain why HBr is a stronger acid than HF?


A) Br- is more stable than F- because Br- is larger than F-.
B) Br- is less stable than F- because Br- is larger than F-.
C) Br- is more stable than F- because Br- is less electronegative than F-.
D) Br- is less stable than F- because Br- is less electronegative than F-.

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

Correct Answer

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