In the trinitrocellulose, each glucose unit contains how many-OH groups

Options

A. 2
B. 3
C. 4
D. 5

Answer

To determine how many -OH groups are present in each glucose unit of trinitrocellulose, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Cellulose**:
- Cellulose is a polysaccharide made up of repeating glucose units. Each glucose unit has a specific molecular structure.

2. **Identify the Molecular Formula of Glucose**:
- The molecular formula for glucose is C6H12O6. In its structure, glucose contains multiple hydroxyl (-OH) groups.

3. **Count the -OH Groups in Glucose**:
- In the structure of glucose, there are 5 -OH groups. This is because, in addition to the -OH group on the first carbon (anomeric carbon), there are -OH groups on the other four carbons.

4. **Consider the Modification in Trinitrocellulose**:
- Trinitrocellulose is formed by nitrating cellulose, where some of the -OH groups are replaced by nitro (-NO2) groups. However, the question specifically asks about the number of -OH groups in each glucose unit before nitration.

5. **Conclusion**:
- Therefore, each glucose unit in trinitrocellulose originally contains **5 -OH groups** before any modification occurs.

### Final Answer:
Each glucose unit in trinitrocellulose contains **5 -OH groups**.

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