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: Concept Hydrolysis of disaccharides yields constituent monosaccharides.

Step 2: Meaning 1 mole of Sucrose $\rightarrow$ 1 mole Glucose + 1 mole Fructose.
1 mole of Lactose $\rightarrow$ 1 mole Glucose + 1 mole Galactose.

Step 3: Analysis Both Sucrose and Lactose produce exactly 1 mole of glucose per mole of carbohydrate. Maltose produces 2 moles of glucose.

Step 4: Conclusion Thus, Sucrose and Lactose yield an equal quantity (1 unit) of glucose. Final Answer: (A)