Question

The incorrect statement about Glucose is :

• A. Glucose is soluble in water because of having aldehyde functional group
• B. Glucose remains in multiple isomeric form in its aqueous solution
• C. Glucose is an aldohexose
• D. Glucose is one of the monomer unit in sucrose

Answer 1

The Correct Option is A

The question asks us to identify the incorrect statement about Glucose from the given options.

1. 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.
2. 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.
3. 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).
4. 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.

Answer 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.

1. 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.
2. 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.
3. 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.
4. 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.