The halides which can react with water or undergo hydrolysis are `PCl_(5), SiCl_(4), BCl_(3), C Cl_(4) and SF_(6)`

Options

A. `PCl_(5), SiCl_(4), BCl_(3), C Cl_(4) and SF_(6)`
B. `PCl_(5), SiCl_(4), BCl_(3) and C Cl_(4)`
C. `PCl_(5), SiCl_(4) and BCl_(3)`
D. `PCl_(5) and SiCl_(4)`

Answer

To determine which halides can react with water or undergo hydrolysis among the given options \( PCl_5, SiCl_4, BCl_3, CCl_4, \) and \( SF_6 \), we will analyze each compound step by step.

### Step 1: Analyze \( PCl_5 \)
- **Structure**: Phosphorus pentachloride has a trigonal bipyramidal structure.
- **Vacant Orbitals**: Phosphorus has vacant d-orbitals.
- **Reactivity with Water**: The presence of vacant orbitals allows nucleophilic attack by water. Thus, \( PCl_5 \) can undergo hydrolysis.
- **Conclusion**: \( PCl_5 \) reacts with water.

### Step 2: Analyze \( SiCl_4 \)
- **Structure**: Silicon tetrachloride has a tetrahedral structure.
- **Vacant Orbitals**: Silicon also has vacant d-orbitals.
- **Reactivity with Water**: Similar to \( PCl_5 \), the vacant orbitals allow nucleophilic attack by water, leading to hydrolysis.
- **Conclusion**: \( SiCl_4 \) reacts with water.

### Step 3: Analyze \( BCl_3 \)
- **Structure**: Boron trichloride has a trigonal planar structure.
- **Electron Deficiency**: Boron is electron-deficient (it has only 6 electrons in its valence shell).
- **Reactivity with Water**: The electron deficiency allows water to act as a nucleophile, leading to hydrolysis.
- **Conclusion**: \( BCl_3 \) reacts with water.

### Step 4: Analyze \( CCl_4 \)
- **Structure**: Carbon tetrachloride has a tetrahedral structure.
- **Vacant Orbitals**: Carbon does not have vacant d-orbitals.
- **Steric Hindrance**: The small size of carbon leads to steric hindrance, preventing nucleophilic attack by water.
- **Conclusion**: \( CCl_4 \) does not react with water.

### Step 5: Analyze \( SF_6 \)
- **Structure**: Sulfur hexafluoride has an octahedral structure.
- **Steric Hindrance**: The presence of 6 fluorine atoms creates significant steric hindrance around sulfur.
- **Reactivity with Water**: The steric hindrance prevents nucleophilic attack by water.
- **Conclusion**: \( SF_6 \) does not react with water.

### Final Conclusion
The halides that can react with water or undergo hydrolysis are:
- \( PCl_5 \)
- \( SiCl_4 \)
- \( BCl_3 \)

Thus, the correct answer is that \( PCl_5, SiCl_4, \) and \( BCl_3 \) can undergo hydrolysis.