Glucose on prolonged heating with HI, forms

Options

A. n-Pentane
B. n-Hexane
C. lodopentane
D. lodohexane

Answer

To solve the question of what glucose forms upon prolonged heating with hydrogen iodide (HI), we can follow these steps:

### Step 1: Understand the Structure of Glucose
Glucose is a simple sugar with the molecular formula C6H12O6. It is an aldohexose, which means it has six carbon atoms and an aldehyde group.

### Step 2: Recognize the Reaction with Hydrogen Iodide
When glucose is heated with hydrogen iodide, it undergoes a reduction reaction. The HI acts as a reducing agent, which can lead to the removal of the oxygen atoms from the glucose molecule.

### Step 3: Determine the Products of the Reaction
Upon prolonged heating with HI, the hydroxyl (–OH) groups in glucose can be replaced by iodine, and the aldehyde group can be reduced. This results in the formation of a hydrocarbon.

### Step 4: Identify the Hydrocarbon Formed
The reduction of glucose leads to the formation of a straight-chain alkane. In this case, the product is hexane (C6H14), which is a saturated hydrocarbon with a straight-chain structure.

### Step 5: Conclusion
Therefore, the final product of glucose on prolonged heating with hydrogen iodide is hexane.

### Final Answer
Glucose on prolonged heating with HI forms hexane.

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