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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

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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

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How many stereoisomers of 1,3-dibromocyclopentane exist?


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

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Give the IUPAC name for the following compound: Give the IUPAC name for the following compound: A) R-3-methylhexane B) S-3-methylhexane C) R-4-methylhexane D) S-4-methylhexane


A) R-3-methylhexane
B) S-3-methylhexane
C) R-4-methylhexane
D) S-4-methylhexane

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How many chiral stereoisomers can be drawn for dimethycyclopropane?


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

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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) 0 B) 1 C) 2 D) 3


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

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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

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A

Which of the following is the definition of chirality?


A) The existence of a molecule with a mirror image.
B) The existence of a molecule with a carbon atom that has four different substituents.
C) The existence of a molecule that is superimposable on its mirror image.
D) The existence of a molecule that is not superimposable on its mirror image.

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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°

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Give the IUPAC name for the following compound: Give the IUPAC name for the following compound: A) (1R,3R) -1-ethyl-3-methylcyclohexane B) (1R,3S) -1-ethyl-3-methylcyclohexane C) (1S,3R) -1-ethyl-3-methylcyclohexane D) (1S,3S) -1-ethyl-3-methylcyclohexane


A) (1R,3R) -1-ethyl-3-methylcyclohexane
B) (1R,3S) -1-ethyl-3-methylcyclohexane
C) (1S,3R) -1-ethyl-3-methylcyclohexane
D) (1S,3S) -1-ethyl-3-methylcyclohexane

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How many isomers (constitutional and stereoisomers) exist for dimethylcyclobutane?


A) 3
B) 4
C) 5
D) 6

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D

How many stereogenic centers are present in fructose,a simple sugar? How many stereogenic centers are present in fructose,a simple sugar? A) 1 B) 2 C) 3 D) 4


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

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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) 0 B) 1 C) 2 D) 3


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

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Rank the following groups in order of decreasing priority according to the Cahn-Ingold-Prelog system. Rank the following groups in order of decreasing priority according to the Cahn-Ingold-Prelog system. A) I > III > IV > II B) III > IV > I > II C) IV > III > I > II D) IV > I > III > II


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

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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

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Which of the following molecules has a plane of symmetry? Which of the following molecules has a plane of symmetry? A) I B) II C) III D) IV


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

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Which of the following cyclic molecules is a meso compound? Which of the following cyclic molecules is a meso compound? A) I B) II C) III D) IV


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

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Which of the following statements about constitutional isomers is 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.

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B

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

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.

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