Which of the following halides does not hydrolyse at room temperature?

Options

A. `PbCl_(4)`
B. `SiCl_(4)`
C. `C C l_(4)`
D. `SnCl_(4)`

Answer

To determine which halide does not hydrolyze at room temperature, we will analyze the hydrolysis reactions of the given halides. The halides in question are typically carbon-based compounds, and we will focus on their ability to react with water.

### Step-by-Step Solution:

1. **Identify the Halides:**
- The halides we are considering are CCl4 (carbon tetrachloride), CBr4 (carbon tetrabromide), and CF4 (carbon tetrafluoride).

2. **Understand Hydrolysis:**
- Hydrolysis is a reaction where water reacts with a compound, leading to the breakdown of that compound. For halides, this typically involves the substitution of halide ions by hydroxide ions (OH⁻) from water.

3. **Evaluate CCl4:**
- CCl4 does not hydrolyze at room temperature. The reason is that it lacks vacant low-lying d-orbitals which are necessary for the hydrolysis reaction to occur. Additionally, the steric hindrance caused by the large chlorine atoms prevents the hydroxide ion from approaching the carbon atom effectively.

4. **Evaluate CBr4 and CF4:**
- CBr4 and CF4 can hydrolyze under certain conditions. CBr4 may undergo hydrolysis at elevated temperatures, while CF4 is generally more stable and less reactive due to the strong C-F bonds. However, both can react with water under specific conditions.

5. **Conclusion:**
- Based on the analysis, the halide that does not hydrolyze at room temperature is **CCl4**.

### Final Answer:
The halide that does not hydrolyze at room temperature is **CCl4**.