Which of the following polymers can have strong intermolecular forces ?

Options

A. Nylon
B. Polystyrene
C. Rubber
D. Polysters

Explanation

To determine which of the given polymers can have strong intermolecular forces, we can analyze each option based on their classifications and the nature of their intermolecular interactions.

### Step-by-Step Solution:

1. **Identify the Polymers**: The given polymers are:
- Nylon
- Polystyrene
- Rubber
- Polyester

2. **Classify the Polymers**:
- **Nylon**: This is a type of fiber. Fibers typically have high intermolecular attractions due to strong hydrogen bonding or dipole-dipole interactions.
- **Polystyrene**: This is classified as a thermoplastic polymer. Thermoplastics generally have moderate intermolecular forces, which are weaker than those found in fibers.
- **Rubber**: Rubber is classified as an elastomer. Elastomers have the weakest intermolecular forces because they are designed to stretch and return to their original shape.
- **Polyester**: Like nylon, polyester is also a fiber and exhibits strong intermolecular forces due to hydrogen bonding or dipole-dipole interactions.

3. **Evaluate Intermolecular Forces**:
- **Nylon**: Strong intermolecular forces due to hydrogen bonding.
- **Polystyrene**: Weaker intermolecular forces compared to fibers.
- **Rubber**: Very weak intermolecular forces.
- **Polyester**: Strong intermolecular forces similar to nylon.

4. **Conclusion**: Based on the classifications and the nature of intermolecular forces:
- **Nylon** and **Polyester** are the polymers that can have strong intermolecular forces.

### Final Answer:
The polymers that can have strong intermolecular forces are **Nylon (Option 1)** and **Polyester (Option 4)**.

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