The correct statement about silicone is

Options

A. They are ketones with silyl group `(SiH_(3))` similar to alkyl, `(SiH_(3))_(2)CO`
B. They are synthetic polymer containing repeated `R_(2)SiO_(2)` units
C. They are formed by hydrolysis of `R_(2)SiCl_(2)`
D. All of the above

Explanation

To determine the correct statement about silicone, we need to analyze the properties and characteristics of silicone based on the information provided.

### Step-by-Step Solution:

1. **Understanding Silicone Structure**:
- Silicone is a synthetic polymer that consists of repeating units of the form R2-Si-O, where R represents organic groups (alkyl or aryl groups). This structure is similar to that of ketones, which have the general formula R2-CO.

**Hint**: Remember that silicone's structure is based on silicon and oxygen, and it has repeating units that define its polymeric nature.

2. **Formation of Silicone**:
- Silicone can be formed through the hydrolysis of dichlorosilanes (R2-SiCl2). During hydrolysis, the chlorine atoms are replaced by hydroxyl groups (OH), leading to the formation of silanol (R2-SiOH).

**Hint**: Hydrolysis is a key reaction in forming silicone, where dichlorosilanes react with water.

3. **Polymerization Process**:
- The silanol groups (R2-SiOH) can further react with each other, leading to the formation of siloxane bonds (Si-O-Si) and resulting in a polymeric structure. This process involves the condensation of silanol groups to form a long-chain polymer.

**Hint**: Look for the connection between silanol groups and the formation of siloxane bonds in silicone.

4. **Characteristics of Silicone**:
- Silicone polymers are known for their flexibility, thermal stability, and resistance to moisture and chemicals. They are widely used in various applications, including sealants, adhesives, and medical devices.

**Hint**: Consider the practical applications of silicone to understand its properties better.

5. **Identifying the Correct Statement**:
- Based on the analysis, the correct statement about silicone is that it is formed by the hydrolysis of dichlorosilanes and consists of repeating units of R2-Si-O.

**Hint**: Focus on the formation process and the repeating unit to identify the correct statement.

### Conclusion:
The correct statement about silicone is that it is a synthetic polymer formed by the hydrolysis of dichlorosilanes, and it contains repeating units of R2-Si-O.