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STATEMENT-1 : alpha-D-glucoso shows muta...

STATEMENT-1 : `alpha`-D-glucoso shows mutarotation.
STATEMENT-2 : Sucrose on hydrolysis produces `beta`-D-glucose.
STATEMENT-3: Mannose is an aldohexose

A

TFT

B

FTF

C

TTT

D

FFF

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to evaluate the three statements provided and determine if they are true or false. ### Step-by-Step Solution: 1. **Evaluate Statement 1: `alpha`-D-glucose shows mutarotation.** - **Definition of Mutarotation:** Mutarotation is the change in the optical rotation of a solution as it reaches equilibrium between different anomeric forms (α and β forms) of a sugar. - **For `alpha`-D-glucose:** It can interconvert with `beta`-D-glucose. The specific rotation of `alpha`-D-glucose is +112°, and that of `beta`-D-glucose is +19°. When they reach equilibrium, the specific rotation becomes +52°. - **Conclusion:** Since `alpha`-D-glucose does show mutarotation, **Statement 1 is True.** 2. **Evaluate Statement 2: Sucrose on hydrolysis produces `beta`-D-glucose.** - **Composition of Sucrose:** Sucrose is a disaccharide composed of `alpha`-D-glucose and `beta`-D-fructose. - **Hydrolysis Reaction:** When sucrose is hydrolyzed, it yields one molecule of `alpha`-D-glucose and one molecule of `beta`-D-fructose, not `beta`-D-glucose. - **Conclusion:** Therefore, **Statement 2 is False.** 3. **Evaluate Statement 3: Mannose is an aldohexose.** - **Definition of Aldohexose:** An aldohexose is a six-carbon sugar with an aldehyde group (CHO). - **Structure of Mannose:** Mannose has six carbon atoms and contains an aldehyde group at the first carbon (CHO). Thus, it fits the definition of an aldohexose. - **Conclusion:** Hence, **Statement 3 is True.** ### Final Evaluation: - **Statement 1:** True - **Statement 2:** False - **Statement 3:** True The correct option based on the evaluation is **Option A: True, False, True**.
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