Question 1

Which of the following structures is chiral?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) A) and C)
F) All of the above

Question 2

An unknown sample is tested with a polarimeter for optical activity. The results of the test required no movement of the analyzer. This sample could be either a meso compound or a racemic mixture.

Accepted Answer

A) True 
 B)False

Question 3

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

Accepted Answer

A)  2
B)  3
C)  4
D)  5E) None of the above
F) B) and C)

Question 4

Which of the following substituents has the highest priority according to the Cahn-Ingold-Prelog system used in assigning R and S configurations?

Accepted Answer

A)  "-NH2"
B)  "-NHCH3"
C)  "-CH2NH2"
D)  "-CH2NHCH3"E) B) and C)
F) A) and D)

Question 5

Complete the following diagram so that it represents (S)-2-butanol.

Accepted Answer

The answer of Complete the following diagram so that it...

Question 6

The specific rotation of the S-enantiomer of a compound is -120º. A student determines that a sample of the compound has a specific rotation of +60º. What mass of the S-enantiomer is present in 10 g of the sample

Accepted Answer

The answer of The specific rotation of the S-enantiomer of...

Question 7

How much of the R enantiomer is present in 10 g of a mixture which has an enantiomeric excess of 20% of the S isomer?

Accepted Answer

A)  1 g
B)  2 g
C)  4 g
D)  6 gE) None of the above
F) B) and D)

Question 8

Which of the following is the definition of a pair of enantiomers?

Accepted Answer

A)  A pair of structures that are superposable mirror images of one another
B)  A pair of stereoisomers that are non-superposable mirror images of one another
C)  A pair of stereoisomers that are not mirror images of one another
D)  A pair of stereoisomers that have equal specific rotationsE) None of the above
F) B) and C)

Question 9

The specific rotation of enantiomers have the same magnitude.

Accepted Answer

A) True 
 B)False

Question 10

Of the compounds listed below, only 2 has a chiral centers.

Accepted Answer

A) True 
 B)False

Question 11

What mass of (S)-(-)-mandelic acid is present in a 10 g sample which has an enantiomeric excess of 20% of the S-enantiomer?

Accepted Answer

The answer of What mass of (S)-(-)-mandelic acid is present...

Question 12

Which of the following is the definition of a meso compound?

Accepted Answer

A)  A molecule with stereocenter centers which is chiral
B)  A molecule with stereocenter centers which is not chiral
C)  A diastereomer with no stereocenter centers
D)  A chiral compound with more than one stereocenter centerE) A) and B)
F) B) and C)

Question 13

How many chiral centers are there in the following molecule (the naturally occurring stereoisomer is camphor, a pungent moth repellent) ?

Accepted Answer

A)  Two
B)  Three
C)  Four
D)  FiveE) All of the above
F) C) and D)

Exam 3: Stereoisomerism and Chirality

Complete the following diagram so that it represents (S)-2-butanol.

Correct Answer
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Which of the following structures is chiral?

Correct Answer
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Which of the following is the definition of a meso compound?

Correct Answer
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The specific rotation of the S-enantiomer of a compound is -120º. A student determines that a sample of the compound has a specific rotation of +60º. What mass of the S-enantiomer is present in 10 g of the sample

Correct Answer
verified

An unknown sample is tested with a polarimeter for optical activity. The results of the test required no movement of the analyzer. This sample could be either a meso compound or a racemic mixture.

Correct Answer
verified

Which of the following is the definition of a pair of enantiomers?

Correct Answer
verified

The specific rotation of enantiomers have the same magnitude.

Correct Answer
verified

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

Correct Answer
verified

Of the compounds listed below, only 2 has a chiral centers.

Correct Answer
verified

How many chiral centers are there in the following molecule (the naturally occurring stereoisomer is camphor, a pungent moth repellent) ?

Correct Answer
verified

How much of the R enantiomer is present in 10 g of a mixture which has an enantiomeric excess of 20% of the S isomer?

Correct Answer
verified

Which of the following substituents has the highest priority according to the Cahn-Ingold-Prelog system used in assigning R and S configurations?

Correct Answer
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What mass of (S)-(-)-mandelic acid is present in a 10 g sample which has an enantiomeric excess of 20% of the S-enantiomer?

Correct Answer
verified

Exam 3: Stereoisomerism and Chirality

Complete the following diagram so that it represents (S)-2-butanol.

Correct AnswerverifiedShow Answer

Which of the following structures is chiral?

Correct AnswerverifiedShow Answer

Which of the following is the definition of a meso compound?

Correct AnswerverifiedShow Answer

The specific rotation of the S-enantiomer of a compound is -120º. A student determines that a sample of the compound has a specific rotation of +60º. What mass of the S-enantiomer is present in 10 g of the sample

Correct AnswerverifiedShow Answer

An unknown sample is tested with a polarimeter for optical activity. The results of the test required no movement of the analyzer. This sample could be either a meso compound or a racemic mixture.

Correct AnswerverifiedShow Answer

Which of the following is the definition of a pair of enantiomers?

Correct AnswerverifiedShow Answer

The specific rotation of enantiomers have the same magnitude.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Of the compounds listed below, only 2 has a chiral centers.

Correct AnswerverifiedShow Answer

How many chiral centers are there in the following molecule (the naturally occurring stereoisomer is camphor, a pungent moth repellent) ?

Correct AnswerverifiedShow Answer

How much of the R enantiomer is present in 10 g of a mixture which has an enantiomeric excess of 20% of the S isomer?

Correct AnswerverifiedShow Answer

Which of the following substituents has the highest priority according to the Cahn-Ingold-Prelog system used in assigning R and S configurations?

Correct AnswerverifiedShow Answer

What mass of (S)-(-)-mandelic acid is present in a 10 g sample which has an enantiomeric excess of 20% of the S-enantiomer?

Correct AnswerverifiedShow Answer

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