Which of the following halide cannot hydrolysed ?

Options

A. `C Cl_4`
B. `Si Cl_4`
C. `Ge Cl_4`
D. `Si F_4`

Answer

To determine which halide cannot be hydrolyzed, we need to analyze the properties of the given halides. In this case, we will focus on CCl4 (carbon tetrachloride) and understand why it cannot undergo hydrolysis.

### Step-by-Step Solution:

1. **Understanding Hydrolysis**: Hydrolysis is a chemical reaction involving the breaking of a bond in a molecule by the addition of water. In the case of halides, this typically involves the substitution of a halogen atom with a hydroxyl group (-OH).

2. **Identifying the Halide**: The halide in question is CCl4 (carbon tetrachloride). It consists of a central carbon atom bonded to four chlorine atoms.

3. **Analyzing the Carbon Atom**: Carbon in CCl4 does not have low-lying vacant d-orbitals. This is crucial because the presence of vacant d-orbitals allows for the interaction with water molecules, facilitating hydrolysis.

4. **Steric Hindrance**: The four chlorine atoms surrounding the carbon create significant steric hindrance. This means that the large size of the chlorine atoms makes it difficult for water molecules to approach the carbon atom to initiate hydrolysis.

5. **Repulsion Effects**: Additionally, when a water molecule approaches the carbon atom, it may experience repulsion due to the partial negative charge associated with the chlorine atoms. This further inhibits the hydrolysis process.

6. **Conclusion**: Due to the lack of available d-orbitals and the steric hindrance caused by the chlorine atoms, CCl4 cannot undergo hydrolysis under normal conditions.

### Final Answer:
CCl4 (carbon tetrachloride) cannot be hydrolyzed.

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