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Which of the following statements is true?


A) Enantiomers are mirror images that are not superimposable.
B) A molecule that is superimposable on its mirror image is chiral.
C) A chiral molecule usually contains a plane of symmetry.
D) An achiral molecule does not contain a plane of symmetry.

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

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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) A) and D)

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Which of the following statements is true?


A) The presence of a plane of symmetry makes a molecule chiral.
B) An achiral molecule must have one or more stereogenic centers.
C) All molecules that have stereogenic centers are chiral.
D) Stereoisomers that are not superimposable on their mirror image are enantiomers.

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

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

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How many stereoisomers of 1,3-dibromocyclopentane exist?


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

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

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What is the total number of possible stereoisomers for the following molecule? What is the total number of possible stereoisomers for the following molecule? A) 2 B) 4 C) 6 D) 8


A) 2
B) 4
C) 6
D) 8

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

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Rank the following groups in order of decreasing priority according to the Cahn-Ingold-Prelog system. −CH3−CH2OH−COOH−CHO I  II  III  IV \begin{array} { c c c c } - \mathrm { CH } _ { 3 } & - \mathrm { CH } _ { 2 } \mathrm { OH } & - \mathrm { COOH } & - \mathrm { CHO } \\\text { I } & \text { II } & \text { III } & \text { IV }\end{array}


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

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

Correct Answer

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Which of the following molecules are chiral? I. 2-Chlorobutane II) 3-Bromopentane III) 1-Bromo-2-methylpropene IV) 2-Bromo-3-methylbutane


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

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

Correct Answer

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

Correct Answer

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How many stereoisomers can be drawn for a molecule with formula CH3CH(OH) CH(OH) CH3?


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

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

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 B)
F) A) and C)

Correct Answer

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What is the relationship between the following two compounds? What is the relationship between the following two compounds? A) Constitutional isomers B) Identical C) Stereoisomers D) Not isomers, different compounds


A) Constitutional isomers
B) Identical
C) Stereoisomers
D) Not isomers, different compounds

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

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

Correct Answer

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Which of the following statements about constitutional isomers if not true?


A) They have different IUPAC names.
B) They always have the same functional groups.
C) They have different physical properties.
D) They have different chemical properties.

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

Correct Answer

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Which of the following molecules are achiral? Which of the following molecules are achiral? 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 C)
F) A) and D)

Correct Answer

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Which of the following statements is true?


A) Achiral molecules usually contain a plane of symmetry.
B) With one tetrahedral stereogenic center, a molecule may or may not be chiral.
C) With two or more stereogenic centers, a molecule is always chiral.
D) Chiral molecules usually contain a plane of symmetry.

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

Correct Answer

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What is the main carbohydrate in the seeds and roots of plants?


A) Starch
B) Glucose
C) Cellulose
D) Glycogen

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

Correct Answer

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Which of the following compounds can have a meso stereoisomer? Which of the following compounds can have a meso stereoisomer? A) I B) II C) III D) IV


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

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

Correct Answer

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