Cross linked polymer Silicone is formed by hydrolysis of

Explanation

To solve the question regarding the formation of cross-linked polymer silicone through hydrolysis, we can break down the process step by step:

### Step-by-Step Solution:

1. **Identify the Reactant**: The question asks about the hydrolysis of a specific compound that leads to the formation of cross-linked polymer silicone. The relevant compound here is **alkyl trichlorosilane**.

2. **Write the General Formula**: The general formula for alkyl trichlorosilane can be represented as **R-SiCl3**, where R is an alkyl group (like methyl, ethyl, etc.).

3. **Hydrolysis Reaction**: When alkyl trichlorosilane undergoes hydrolysis, it reacts with water (H2O). The reaction can be represented as follows:
\[ R-SiCl_3 + 3H_2O \rightarrow R-Si(OH)_3 + 3HCl \]
Here, HCl is released as a by-product.

4. **Formation of Cross-Linked Structure**: The product **R-Si(OH)3** can further react with other alkyl trichlorosilanes or itself, leading to the formation of a cross-linked network. This cross-linking occurs through the condensation of hydroxyl groups, resulting in the release of water and the formation of siloxane bonds (Si-O-Si).

5. **Conclusion**: Therefore, the cross-linked polymer silicone is formed by the hydrolysis of **alkyl trichlorosilane (R-SiCl3)**.

### Final Answer:
Cross-linked polymer silicone is formed by the hydrolysis of **alkyl trichlorosilane (R-SiCl3)**.

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