Which one of the following does not undergo hydrolysis?

Options

A. `AsCl_(3)`
B. `SbCl_(3)`
C. `PCl_(3)`
D. `NF_(3)`

Explanation

To determine which compound does not undergo hydrolysis among the given options, we will analyze each compound based on their chemical properties and the presence of vacant d orbitals.

### Step-by-Step Solution:

1. **Understanding Hydrolysis**: Hydrolysis is a chemical reaction involving water that leads to the breakdown of a compound. For a compound to undergo hydrolysis, it typically requires the central atom to have vacant d orbitals to accommodate the lone pairs of electrons from water molecules.

2. **Analyzing the Compounds**:
- **Option 1: AlCl3 (Aluminum Chloride)**:
- Aluminum has vacant d orbitals and can accept lone pairs from water, thus it undergoes hydrolysis to form Al(OH)3.
- **Option 2: SbCl3 (Antimony Trichloride)**:
- Antimony also has vacant d orbitals and can undergo hydrolysis, forming Sb(OH)3.
- **Option 3: PCl3 (Phosphorus Trichloride)**:
- Phosphorus can undergo hydrolysis as it has vacant d orbitals, leading to the formation of H3PO3.
- **Option 4: NF3 (Nitrogen Trifluoride)**:
- Nitrogen does not have vacant d orbitals. Therefore, it cannot accept lone pairs from water and does not undergo hydrolysis.

3. **Conclusion**: Based on the analysis, the compound that does not undergo hydrolysis is **NF3 (Nitrogen Trifluoride)**.

### Final Answer:
**NF3 does not undergo hydrolysis.**