Generally for natural polymers PDI is

Options

A. 0
B. 1
C. 10
D. 100

Answer

To solve the question regarding the Polydispersity Index (PDI) for natural polymers, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of PDI**:
- The Polydispersity Index (PDI) is a measure that indicates the distribution of molecular mass in a given polymer sample. It is defined as the ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn).

2. **Identify the Values of PDI**:
- For polymers, the PDI can take various values:
- A PDI of 1 indicates a monodisperse sample, meaning all molecules have the same molecular weight.
- A PDI greater than 1 indicates a polydisperse sample, where there is a distribution of molecular weights.

3. **Determine the PDI for Natural Polymers**:
- Natural polymers, such as proteins and polysaccharides, are typically more uniform in their molecular weight distribution compared to synthetic polymers. This uniformity leads to a PDI value that is close to 1.

4. **Conclude the Answer**:
- Since the PDI for natural polymers is generally considered to be monodisperse, we conclude that the value of PDI for natural polymers is 1.

5. **Select the Correct Option**:
- Among the provided options:
- 0
- 1
- 10
- 100
- The correct answer is option 2, which states that the PDI for natural polymers is 1.

### Final Answer:
The correct answer is **1**.

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