
Concept explainers
(a)
Interpretation:
Whether hexose corresponds to the correct description of the
Concept introduction:
Carbohydrates are a class of organic compounds. They can be present in the form of open chains or rings. They are usually an
The six-membered ring form of carbohydrates is termed as pyranose. The five-membered ring form of carbohydrates is termed as furanose.

Answer to Problem 24.40AP
The sugar hexose is not the correct description of
Explanation of Solution
Monosaccharide with the six-carbon atom is known as hexose.
The presence of a keto group in
However, the keto group is missing in hexose as shown below.
Figure 1
The term hexose is not the correct description of the
(b)
Interpretation:
Whether ketohexose corresponds to the correct description of the
Concept introduction:
Carbohydrates are a class of organic compounds. They can be present in the form of open chains or rings. They are usually an aldehyde or ketone with additional hydroxyl groups. The six-membered ring form of carbohydrates is termed as pyranose. The five-membered ring form of carbohydrates is termed as furanose.

Answer to Problem 24.40AP
The sugar ketohexose is the correct description of
Explanation of Solution
The class of the sugars which is fundamental in carbohydrates with presence of keto group is known as ketohexose sugars.
The presence of keto group in ketohexose shows similarity with
Figure 2
The ketohexose is the correct description of the
(c)
Interpretation:
Whether glycoside molecule corresponds to the correct description of the
Concept introduction:
Carbohydrates are a class of organic compounds. They can be present in the form of open chains or rings. They are usually an aldehyde or ketone with additional hydroxyl groups. The six-membered ring form of carbohydrates is termed as pyranose. The five-membered ring form of carbohydrates is termed as furanose.

Answer to Problem 24.40AP
The carbohydrate
Explanation of Solution
Two molecules of sugar which are connected to a glycosidic bond is known as glycoside molecule. The glycosidic bond is used to join two carbohydrate molecules.
The cyclic acetal group is not present in the
The glycoside molecule is not the correct description of the
(d)
Interpretation:
Whether aldohexose corresponds to the correct description of the
Concept introduction:
Carbohydrates are a class of organic compounds. They can be present in the form of open chains or rings. They are usually an aldehyde or ketone with additional hydroxyl groups. The six-membered ring form of carbohydrates is termed as pyranose. The five-membered ring form of carbohydrates is termed as furanose.

Answer to Problem 24.40AP
The carbohydrate
Explanation of Solution
The aldohexose belongs to the category of hexose in which aldehyde group is present at first carbon. In the
The sugar
(e)
Interpretation:
Whether given structure corresponds to the correct description of the
Concept introduction:
Carbohydrates are a class of organic compounds. They can be present in the form of open chains or rings. They are usually an aldehyde or ketone with additional hydroxyl groups. The six-membered ring form of carbohydrates is termed as pyranose. The five-membered ring form of carbohydrates is termed as furanose.

Answer to Problem 24.40AP
The given structure is the correct description of
Explanation of Solution
The stereocenters are defined as the centers which are chiral in nature or attached with four different substituents. The stereocenters which are in direction of anticlockwise or left-hand nomenclaturehave
The configuration of
Figure 3
Therefore, the given structure is the correct description of
The given structure shown in Figure 3 is the correct description of
(f)
Interpretation:
Whether given structure corresponds to the correct description of the
Concept introduction:
Carbohydrates are a class of organic compounds. They can be present in the form of open chains or rings. They are usually an aldehyde or ketone with additional hydroxyl groups. The six-membered ring form of carbohydrates is termed as pyranose. The five-membered ring form of carbohydrates is termed as furanose.

Answer to Problem 24.40AP
The given structure is not similar to the
Explanation of Solution
The stereocenters are defined as the centers which are chiral in nature or attached with four different substituents. The stereocenters which are in the direction of anticlockwise or left-hand nomenclature, the configuration of that stereocenter is
The configuration of
Figure 4
The given structure shown in Figure 4 is not the correct description of
(g)
Interpretation:
Whether given structure corresponds to the correct description of the
Concept introduction:
Carbohydrates are a class of organic compounds. They can be present in the form of open chains or rings. They are usually an aldehyde or ketone with additional hydroxyl groups. The six-membered ring form of carbohydrates is termed as pyranose. The five-membered ring form of carbohydrates is termed as furanose.

Answer to Problem 24.40AP
The given structure is not similar to the
Explanation of Solution
The Haworth projection is used for the arrangements of cyclic sugars. The
Figure 5
The given structure is not a proper description for
(h)
Interpretation:
Whether given structure corresponds to the correct description of the
Concept introduction:
Carbohydrates are a class of organic compounds. They can be present in the form of open chains or rings. They are usually an aldehyde or ketone with additional hydroxyl groups. The six-membered ring form of carbohydrates is termed as pyranose. The five-membered ring form of carbohydrates is termed as furanose.

Answer to Problem 24.40AP
The given structure is not similar to the
Explanation of Solution
The Haworth projection is used for the arrangements of cyclic sugars. The
Figure 6
The configuration of sorbose is in
(i)
Interpretation:
Whether given structure corresponds to the correct description of the
Concept introduction:
Carbohydrates are a class of organic compounds. They can be present in the form of open chains or rings. They are usually an aldehyde or ketone with additional hydroxyl groups. The six-membered ring form of carbohydrates is termed as pyranose. The five-membered ring form of carbohydrates is termed as furanose.

Answer to Problem 24.40AP
The given structure is similar to the
Explanation of Solution
The Haworth projection is used for the arrangements of cyclic sugars. The
Figure 7
The given structure is the correct description for
(j)
Interpretation:
Whether given structure corresponds to the correct description of the
Concept introduction:
Carbohydrates are a class of organic compounds. They can be present in the form of open chains or rings. They are usually an aldehyde or ketone with additional hydroxyl groups. The six-membered ring form of carbohydrates is termed as pyranose. The five-membered ring form of carbohydrates is termed as furanose.
The pyranoses can be classified as

Answer to Problem 24.40AP
The given structure is not the correct description of
Explanation of Solution
The most stable conformation of cyclohexane is chair form due to the axial and equatorial position. The angle between the carbon-carbon bond is near about
The given structure is not the correct description of
Figure 8
The given structure is not the correct description of
(k)
Interpretation:
Whether given structure corresponds to the correct description of the
Concept introduction:
Carbohydrates are a class of organic compounds. They can be present in the form of open chains or rings. They are usually an aldehyde or ketone with additional hydroxyl groups. The six-membered ring form of carbohydrates is termed as pyranose. The five-membered ring form of carbohydrates is termed as furanose.

Answer to Problem 24.40AP
The given structure is the correct description of
Explanation of Solution
The most stable conformation of cyclohexane is chair form due to the axial and equatorial position. The angle between the carbon-carbon bond is near about
All the substituents or groups are present in the same manner with respect to the
Figure 9
The given structure is the correct description of
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Chapter 24 Solutions
EBK ORGANIC CHEMISTRY
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