The incorrect statement about Glucose is :
- Glucose is soluble in water because of having aldehyde functional group
- Glucose remains in multiple isomeric form in its aqueous solution
- Glucose is an aldohexose
- Glucose is one of the monomer unit in sucrose
The Correct Option is A
Approach Solution - 1
The question asks us to identify the incorrect statement about Glucose from the given options.
- Option A: "Glucose is soluble in water because of having aldehyde functional group."
- This statement is incorrect. While glucose does have an aldehyde group, its solubility in water is primarily due to the presence of multiple hydroxyl (\(-OH\)) groups. These hydroxyl groups allow glucose to form hydrogen bonds with water, making it highly soluble.
- Option B: "Glucose remains in multiple isomeric forms in its aqueous solution."
- This statement is correct. In aqueous solution, glucose can exist in different isomeric forms, including alpha and beta anomers as well as open-chain and ring forms.
- Option C: "Glucose is an aldohexose."
- This statement is correct. Glucose is classified as an aldohexose because it contains an aldehyde group and a six-carbon sugar (hexose).
- Option D: "Glucose is one of the monomer units in sucrose."
- This statement is correct. Sucrose is a disaccharide composed of glucose and fructose monomer units.
Therefore, the correct answer is: "Glucose is soluble in water because of having aldehyde functional group." This statement is incorrect in representing the primary reason for glucose's solubility in water.
Approach Solution -2
To determine the incorrect statement about glucose from the given options, let's examine each statement individually and understand the fundamental properties of glucose.
- Statement: Glucose is soluble in water because of having aldehyde functional group.
- Glucose is indeed soluble in water; however, this solubility is not primarily due to its aldehyde group. The actual reason is the presence of multiple hydroxyl (\(-\text{OH}\)) groups in its structure, which can form hydrogen bonds with water molecules, enhancing its solubility.
- Statement: Glucose remains in multiple isomeric forms in its aqueous solution.
- This statement is true. In aqueous solutions, glucose exists in equilibrium between its linear structure and cyclic forms, namely α-D-glucopyranose and β-D-glucopyranose (which are anomers), demonstrating isomerism.
- Statement: Glucose is an aldohexose.
- This statement is correct. Glucose is classified as an aldohexose, as it contains six carbon atoms with an aldehyde group at one end.
- Statement: Glucose is one of the monomer units in sucrose.
- This statement is true. Sucrose is a disaccharide composed of one glucose molecule and one fructose molecule.
Thus, the incorrect statement is: Glucose is soluble in water because of having aldehyde functional group. The aldehyde group itself does not contribute significantly to the solubility; instead, it is the multiple hydroxyl groups that play a primary role.
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