Correct statement about silicone polymer is

Options

A. they are organic polymers
B. they are available in liquid, solid and gas phases
C. they are used as surface cabinets for missles
D. they are thermally stable

Explanation

To solve the question regarding the correct statements about silicone polymers, we can analyze each option provided.

### Step-by-Step Solution:

1. **Understanding Silicone Polymers**:
- Silicone polymers are a type of polymer that contains silicon as a primary element in their structure. The basic unit of silicone polymer is represented as R2SiO, where R represents organic groups.

2. **Analyzing the Options**:
- **Option 1: They are organic polymers**:
- This statement is incorrect. Silicone polymers are classified as inorganic polymers because they primarily consist of silicon and oxygen, and do not contain carbon as a main component.

- **Option 2: They are available in liquid, solid, and gas phases**:
- This statement is correct. Silicone polymers can exist in various forms, including liquids (like silicone oils), solids (like silicone rubber), and gases (like certain silicone vapors).

- **Option 3: They are used as surface cabinets for missiles**:
- This statement is also correct. Silicone polymers are known for their heat resistance and are used in various applications, including as protective coatings for missiles and other aerospace components.

- **Option 4: They are thermally stable**:
- This statement is correct as well. Silicone polymers exhibit excellent thermal stability, allowing them to maintain their properties over a wide range of temperatures.

3. **Conclusion**:
- The correct statements about silicone polymers are:
- Option 2: They are available in liquid, solid, and gas phases.
- Option 3: They are used as surface cabinets for missiles.
- Option 4: They are thermally stable.

### Final Answer:
The correct statements about silicone polymers are options 2, 3, and 4.

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