Question 1

The specific rotation of enantiomers have the same magnitude.

Accepted Answer

A) True 
 B)False

Question 2

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

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

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 D)
F) B) and C)

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

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 7

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 8

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

Question 9

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

Question 10

Which of the following structures is chiral?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) None of the above
F) B) and C)

Question 11

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 12

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

Accepted Answer

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

Question 13

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

Exam 3: Stereoisomerism and Chirality

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

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

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

Correct Answer
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Which of the following structures is chiral?

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

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

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

Correct Answer
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The specific rotation of enantiomers have the same magnitude.

Correct Answer
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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
verified

Exam 3: Stereoisomerism and Chirality

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 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

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

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

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

Correct AnswerverifiedShow Answer

Which of the following structures is chiral?

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

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

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

Correct AnswerverifiedShow Answer

The specific rotation of enantiomers have the same magnitude.

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

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