Question

Which from following pairs of carbohydrates produce equal quantity of glucose on hydrolysis per mole?

• A. Sucrose and Lactose
• B. Lactose and Maltose
• C. Sucrose and Maltose
• D. Raffinose and Maltose

Hint:

Maltose = Glucose + Glucose; Sucrose = Glucose + Fructose; Lactose = Glucose + Galactose.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Disaccharides and trisaccharides break down into their constituent monosaccharides upon hydrolysis.
Step 2: Key Formula or Approach:
Identify the hydrolysis products for each sugar:
Sucrose $\rightarrow$ Glucose + Fructose
Lactose $\rightarrow$ Glucose + Galactose
Maltose $\rightarrow$ Glucose + Glucose
Raffinose $\rightarrow$ Glucose + Fructose + Galactose
Step 3: Detailed Explanation:
- 1 mole of Sucrose yields 1 mole of Glucose.
- 1 mole of Lactose yields 1 mole of Glucose.
- 1 mole of Maltose yields 2 moles of Glucose.
- 1 mole of Raffinose yields 1 mole of Glucose.
Comparing the pairs:
(A) Sucrose (1 mol) and Lactose (1 mol) produce equal amounts of glucose.
(B) Lactose (1 mol) and Maltose (2 mol) do not.
(C) Sucrose (1 mol) and Maltose (2 mol) do not.
(D) Raffinose (1 mol) and Maltose (2 mol) do not.
Step 4: Final Answer:
Sucrose and Lactose produce an equal quantity (1 mole) of glucose per mole on hydrolysis.