What is not true about polymers?

Options

A. Polymers have high viscosity
B. Polymers do not carry any charge
C. Polymers scatter light
D. Polymers have low molecular weight

Answer

To determine which statement is not true about polymers, we need to analyze each of the provided options regarding their properties:

1. **Polymers have high viscosity**: This statement is true. Polymers, especially in solution, tend to have high viscosity due to their large molecular size and entanglement of polymer chains.

2. **Polymers do not carry any charge**: This statement is also true. Most polymers are made up of neutral monomeric units, which means they do not carry any net charge.

3. **Polymers scatter light**: This statement is true as well. Polymers can scatter light due to their large size and the presence of structural irregularities, which can cause light to be diffused.

4. **Polymers have low molecular weight**: This statement is not true. Polymers are characterized by having high molecular weight, as they are formed by the polymerization of small monomeric units into large macromolecules.

Based on the analysis of these statements, the answer to the question "What is not true about polymers?" is:

**Option 4: Polymers have low molecular weight.**

### Step-by-Step Solution:

1. **Identify the properties of polymers**: Understand the general characteristics of polymers, including their molecular weight, viscosity, charge, and light scattering abilities.

2. **Evaluate each option**:
- **Option 1**: Confirm that polymers have high viscosity due to their large size.
- **Option 2**: Confirm that polymers are typically neutral and do not carry a charge.
- **Option 3**: Confirm that polymers can scatter light because of their structure.
- **Option 4**: Recognize that polymers are defined by their high molecular weight, thus this statement is incorrect.

3. **Conclude the answer**: After evaluating all options, determine that the statement about polymers having low molecular weight is the only false statement.