When D-Glucose is treated with base it is converted into :

Options

A. D-Fructose
B. D-Mannose
C. D-Galactose
D. D-Arabinose

Answer

To determine what D-Glucose converts into when treated with a base, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding D-Glucose Structure**:
D-Glucose is an aldohexose sugar with the molecular formula C6H12O6. Its structure includes a six-membered ring (pyranose form) with hydroxyl (-OH) groups attached to various carbon atoms.

2. **Reaction with Base**:
When D-Glucose is treated with a dilute base, it undergoes a rearrangement known as the Lobry-De Bruijn-Van Ekenstein rearrangement. This reaction involves the enolization of glucose.

3. **Formation of Enol**:
The base facilitates the conversion of D-Glucose into an enol form. This involves the migration of a hydrogen atom and the formation of a double bond, resulting in an enol structure.

4. **Conversion to Fructose**:
The enol form of D-Glucose can then rearrange to form D-Fructose. This is a ketohexose sugar, which differs from glucose in the position of the carbonyl group.

5. **Further Rearrangement**:
The process can continue, leading to the formation of another sugar, D-Mannose, through further enolization and rearrangement. D-Mannose differs from D-Glucose at the C2 carbon, where the hydroxyl group is positioned differently.

6. **Final Products**:
Therefore, when D-Glucose is treated with a base, it can be converted into D-Fructose and D-Mannose through a series of enolization and rearrangement reactions.

### Final Answer:
When D-Glucose is treated with a base, it is converted into D-Fructose and D-Mannose.

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