Among the following substituted silanes, the one which will give rise to cross linked silicone polymer on hydrolysis is?

Options

A. `R_(4) ` Si
B. R `SiCI_(3)`
C. `R_(2)` SiCI
D. `R_(3)` SiCI

Explanation

To determine which substituted silane will give rise to cross-linked silicone polymer upon hydrolysis, we need to analyze the structure of the silanes and their behavior during hydrolysis.

### Step-by-Step Solution:

1. **Identify the Substituted Silanes**:
We need to consider the general structure of substituted silanes, which can be represented as R-SiCl3, where R is an organic group.

2. **Understand Hydrolysis**:
When silanes undergo hydrolysis, they react with water to replace chlorine atoms with hydroxyl groups. For example:
\[ R-SiCl_3 + 3H_2O \rightarrow R-Si(OH)_3 + 3HCl \]
This reaction produces a silanol (R-Si(OH)3).

3. **Polymerization**:
The silanol groups can undergo condensation reactions, leading to the formation of siloxane (Si-O-Si) linkages. This process can create a cross-linked network if there are sufficient reactive groups available.

4. **Identify the Silane that Promotes Cross-Linking**:
To form a cross-linked silicone polymer, the silane must have at least two reactive groups that can participate in the polymerization process. For example, a silane with the structure R-Si(OH)2Cl can undergo further reactions to create cross-links:
\[ R-Si(OH)_2Cl + R-Si(OH)_2Cl \rightarrow R-Si-O-SiR + HCl \]
This reaction forms a siloxane bond (Si-O-Si), which is essential for cross-linking.

5. **Conclusion**:
Among the substituted silanes, the one that has multiple reactive groups (like R-Si(OH)2Cl or R-Si(OH)3) will lead to cross-linked silicone polymers upon hydrolysis. The specific silane that fits this description should be identified from the options provided in the question.

### Final Answer:
The substituted silane that will give rise to cross-linked silicone polymer upon hydrolysis is the one that has multiple reactive groups capable of forming siloxane bonds.