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Which of the following molecules are chiral? Which of the following molecules are chiral? A) II,III B) I,II C) I,IV D) III,IV


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

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

Correct Answer

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What is the relationship between the following compounds? What is the relationship between the following compounds? A) Constitutional isomers B) Diastereomers C) Enantiomers D) Identical


A) Constitutional isomers
B) Diastereomers
C) Enantiomers
D) Identical

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

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A solution containing 0.4 g/mL of a pure S enantiomer is a 1 dm polarimeter rotates plane polarized light by +5.6°.What is the rotation of a solution containing 0.8 g/mL of the S enantiomer in the same polarimeter?


A) +5.6°
B) +11.2°
C) +2.8°
D) +1.4°

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

Correct Answer

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Which of the following compounds are chiral? Which of the following compounds are chiral? A) I and II B) II and III C) III and IV D) I and IV


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

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

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How many stereogenic centers are present in menthol? How many stereogenic centers are present in menthol? A) 1 B) 2 C) 3 D) 4


A) 1
B) 2
C) 3
D) 4

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

Correct Answer

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A natural product was isolated in the laboratory,and its observed rotation was +10° when measured in a 1 dm sample tube containing 1.0 g of compound in 10 mL of H2O.What is the specific rotation of this compound?


A) -10°
B) +100°
C) +10°
D) -100°

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

Correct Answer

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What is the relationship between the following compounds? What is the relationship between the following compounds? A) Constitutional isomers B) Diastereomers C) Enantiomers D) Identical


A) Constitutional isomers
B) Diastereomers
C) Enantiomers
D) Identical

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

Correct Answer

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How many stereogenic centers are present in the following molecule? How many stereogenic centers are present in the following molecule? A) 1 B) 2 C) 4 D) 5


A) 1
B) 2
C) 4
D) 5

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

Correct Answer

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How many stereogenic centers are present in gabapentin,used clinically to treat seizures and certain types of chronic pain? How many stereogenic centers are present in gabapentin,used clinically to treat seizures and certain types of chronic pain? A) 0 B) 1 C) 2 D) 3


A) 0
B) 1
C) 2
D) 3

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

Correct Answer

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A reaction mixture is three parts of one enantiomer and one part of the other.What is the percent ee of this mixture?


A) 75
B) 40
C) 65
D) 50

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

Correct Answer

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Which of the following statements about meso compounds is not true?


A) A meso compound generally has a plane of symmetry.
B) A meso compound and its mirror image are identical.
C) A meso compound is achiral.
D) A meso compound is chiral.

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

Correct Answer

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How many stereogenic centers are present in the following compound? How many stereogenic centers are present in the following compound? A) 1 B) 2 C) 3 D) 4


A) 1
B) 2
C) 3
D) 4

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

Correct Answer

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Which of the following molecules are chiral? I.cis-1,3-Dibromocyclohexane II) 1-Bromo-1-methylcyclohexane III) trans-1-Bromo-3-methylcyclohexane IV) cis-1-Bromo-3-methylcyclohexane


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

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

Correct Answer

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How many stereoisomers are possible for a molecule with formula CH3CHBrCH(OH) CH3?


A) 1
B) 2
C) 3
D) 4

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

Correct Answer

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Which of the following structures has the R configuration? Which of the following structures has the R configuration? A) Only I B) Only II C) Only I and II D) I,II,and III


A) Only I
B) Only II
C) Only I and II
D) I,II,and III

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

Correct Answer

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What is the relationship between the following compounds? What is the relationship between the following compounds? A) Constitutional isomers B) Diastereomers C) Enantiomers D) Identical


A) Constitutional isomers
B) Diastereomers
C) Enantiomers
D) Identical

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

Correct Answer

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How many stereogenic centers are present in ephedrine,a bronchodilator and decongestant? How many stereogenic centers are present in ephedrine,a bronchodilator and decongestant? A) 0 B) 1 C) 2 D) 3


A) 0
B) 1
C) 2
D) 3

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

Correct Answer

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What is the relationship between the following compounds? What is the relationship between the following compounds? A) Constitutional isomers B) Diastereomers C) Enantiomers D) Identical


A) Constitutional isomers
B) Diastereomers
C) Enantiomers
D) Identical

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

Correct Answer

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Give the IUPAC name for the following compound: Give the IUPAC name for the following compound: A) (1R,2R) -1,2-dimethylcyclopentane B) (1R,2S) -1,2-dimethylcyclopentane C) (1S,2R) -1,2-dimethylcyclopentane D) (1S,2S) -1,2-dimethylcyclopentane


A) (1R,2R) -1,2-dimethylcyclopentane
B) (1R,2S) -1,2-dimethylcyclopentane
C) (1S,2R) -1,2-dimethylcyclopentane
D) (1S,2S) -1,2-dimethylcyclopentane

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

Correct Answer

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A solution containing 0.08 g/mL of a pure R enantiomer in a 1 dm polarimeter rotates plane polarized light by +4°.What is the specific rotation of the S enantiomer?


A) +50°
B) -40°
C) +40°
D) -50°

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

Correct Answer

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Showing 21 - 40 of 76

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