Question 1

Which of the following best describes the relationship between the two molecules shown at the top of the image (one with both chiral centers as R, the other with one R and one S)?

Accepted Answer

They are diastereomers.

Question 2

Diastereomers are stereoisomers that:

Accepted Answer

Have different physical properties such as boiling points and reactivity.

Question 3

Which of the following statements about enantiomers and diastereomers is TRUE?

Accepted Answer

Enantiomers have identical physical properties except for their interaction with plane-polarized light.

Question 4

What is the relationship between the two molecules at the bottom of the image, labeled as (R,S) and (S,R)?

Accepted Answer

They are enantiomers.

Question 5

A meso compound is best described as:

Accepted Answer

A molecule with chiral centers that is superimposable on its mirror image.

Question 6

Which property is NOT typically different between diastereomers?

Accepted Answer

Molecular formula

Question 7

If a compound has two chiral centers and is a meso compound, what can you conclude about its optical activity?

Accepted Answer

It is optically inactive.

Question 8

Which of the following is a correct statement about the physical properties of diastereomers?

Accepted Answer

They have different physical properties such as solubility and melting point.

Question 9

Which of the following pairs of molecules would be considered diastereomers?

Accepted Answer

A pair of molecules with two chiral centers, differing at only one center.

Question 10

Which of the following best explains why diastereomers have different chemical reactivity?

Accepted Answer

They have different spatial arrangements of atoms, leading to different interactions with reagents.

Chapter 5 part 2 Optical Activity, Chirality, and Stereoisomerism in Organic Chemistry

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