Which of the following is not true about polymers ?

Options

A. Polymers are high molecular mass macromolecules
B. Polymers may be of natural or synthetic origin
C. Generally condensation polymers are made up of one type of monomers only
D. They have high viscosity and do not carry any charge

Answer

To determine which statement about polymers is not true, let's analyze each option step by step.

### Step-by-Step Solution:

1. **Evaluate Option 1**: "Polymers are high molecular mass macromolecules."
- **Explanation**: Polymers are indeed high molecular mass macromolecules made up of many repeating units (monomers). This statement is true.
- **Conclusion**: This statement is correct.

2. **Evaluate Option 2**: "Polymers may be of natural or synthetic origin."
- **Explanation**: This statement is also true. Natural polymers include substances like silk, wool, and DNA, while synthetic polymers include nylon, polyethylene, and polyester.
- **Conclusion**: This statement is correct.

3. **Evaluate Option 3**: "Generally, condensation polymers are made up of one type of monomer only."
- **Explanation**: This statement is false. Condensation polymers can be made from two different types of monomers. For example, nylon-6,6 is formed from hexamethylenediamine and adipic acid, which are two different monomers.
- **Conclusion**: This statement is not true.

4. **Evaluate Option 4**: "They have high viscosity and do not carry any charge."
- **Explanation**: Polymers are indeed large chain molecules that typically exhibit high viscosity. Since the monomers are neutral, the overall polymer is also neutral, meaning they do not carry any charge. This statement is true.
- **Conclusion**: This statement is correct.

### Final Answer:
The statement that is not true about polymers is **Option 3**: "Generally, condensation polymers are made up of one type of monomer only."

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