`2RCl+Sioverset("Cu power")underset("570 K")rarr R_(2)SiCl_(2)overset(H_(2)O)rarr R_(2)Si(OH_(2))overset("Polymerisation")rarr X,` Then X will be

Options

A. Linear long chain silicone
B. Cyclic silicone
C. Cross linked silicone
D. none of these

Answer

To solve the given question, we will follow the chemical reactions step by step and analyze the products formed at each stage.

### Step 1: Reaction of RCl with Si
The first reaction involves the combination of 2 moles of RCl with silicon (Si) in the presence of copper powder at 570 K. This reaction can be represented as:

\[ 2RCl + Si \xrightarrow{\text{Cu, 570 K}} R_2SiCl_2 \]

Here, RCl represents an organic halide, and R2SiCl2 is a silicon compound where silicon is bonded to two R groups and two chlorine atoms.

**Hint for Step 1:** Identify the reactants and products based on the reaction conditions provided.

### Step 2: Hydrolysis of R2SiCl2
Next, the product R2SiCl2 undergoes hydrolysis in the presence of water (H2O):

\[ R_2SiCl_2 + 2H_2O \rightarrow R_2Si(OH)_2 + 2HCl \]

In this step, the chlorine atoms are replaced by hydroxyl (OH) groups, leading to the formation of R2Si(OH)2, which is a silanol compound.

**Hint for Step 2:** Understand the process of hydrolysis and how it replaces halogens with hydroxyl groups.

### Step 3: Polymerization of R2Si(OH)2
The final step involves the polymerization of the silanol compound R2Si(OH)2. During polymerization, the hydroxyl groups can react with each other, leading to the formation of siloxane bonds (Si-O-Si) and the elimination of water molecules:

\[ n R_2Si(OH)_2 \rightarrow (R_2Si-O)_n + n H_2O \]

This process results in the formation of a polymeric structure, which is typically linear or branched.

**Hint for Step 3:** Recognize that polymerization can lead to different structures, but in this case, it primarily produces linear or branched chains.

### Conclusion
Based on the above steps, the final product X from the polymerization of R2Si(OH)2 will be a linear chain silicone compound. Therefore, the correct answer is:

**X will be a linear chain silicone.**

### Final Answer
**X = Linear chain silicone**