Given type of silicones are called `[P]`
`-O-oversetoverset(R)(|)underset(R)underset(|)(Si)-O-oversetoverset(R)(|)underset(R)underset(|)(Si)-O-oversetoverset(R)(|)underset(R)underset(|)(Si)-`
`[P]` is prepared by hydrolysis of `[Q]`
`[P]` & `[Q]` are respectively.

Options

A. Linear silicone, `R_(2)SiCl_(2)`
B. branched silicone, `R_(3)SiCl`
C. Cyclic sillicone, `R_(2)SiCl_(2)`
D. Cyclic silicone, `RSiCl_(3)`

Explanation

To solve the problem, we need to identify the type of silicone represented by `[P]` and the compound `[Q]` from which it is prepared.

### Step-by-step Solution:

1. **Identify the Structure of `[P]`:**
The structure given for `[P]` is a linear silicone chain, which consists of repeating units of siloxane (Si-O) bonds with organic groups (R) attached to the silicon atoms. The general formula for linear silicones can be represented as:
\[ -O-Si(R)-O-Si(R)-O-Si(R)- \ldots \]
This indicates that `[P]` is a linear silicone.

**Hint:** Look for repeating units in the structure to identify the type of silicone.

2. **Determine the Preparation Method:**
The problem states that `[P]` is prepared by the hydrolysis of `[Q]`. In silicone chemistry, linear silicones are typically produced through the hydrolysis of silanes.

3. **Identify the Compound `[Q]`:**
The common precursor for linear silicones is a dichlorosilane, which can be represented as:
\[ R_2SiCl_2 \]
where R represents organic groups (like alkyl or aryl groups). When this compound undergoes hydrolysis, the chlorine atoms are replaced by hydroxyl groups, leading to the formation of the siloxane chain.

**Hint:** Recall that dichlorosilanes are often used to produce silicones through hydrolysis.

4. **Conclusion:**
Therefore, we can conclude that:
- `[P]` is a linear silicone.
- `[Q]` is the compound \( R_2SiCl_2 \).

### Final Answer:
- `[P]` is a linear silicone.
- `[Q]` is \( R_2SiCl_2 \).