Hydrolysis is a reaction in which the substance undergoes nucleophilic substitution with the solvent water. If the solvents are `NH_(3)` and ROH, then the corresponding terms are known as ammonolysis and alcoholysis respectively.
Q. Which of the following compounds shows least tendency towards hydrolysis ?

Options

A. `BF_(3)`
B. `BCl_(3)`
C. `BB r_(3)`
D. `BI_(3)`.

Answer

To determine which compound shows the least tendency towards hydrolysis, we need to analyze the nature of the compounds in question. Hydrolysis involves the reaction of a compound with water, leading to the breaking of bonds and the formation of new products.

### Step-by-Step Solution:

1. **Understanding Hydrolysis**: Hydrolysis is a reaction where a compound reacts with water, leading to the breaking of bonds. The tendency of a compound to undergo hydrolysis depends on the strength of the bonds present in that compound.

2. **Identifying the Compounds**: In this case, we are considering BF3 (Boron Trifluoride) and possibly other compounds. We need to compare their tendencies to undergo hydrolysis.

3. **Analyzing BF3**:
- BF3 is a covalent compound where boron forms three strong bonds with fluorine atoms.
- The B-F bond is quite strong, making it less likely to break in the presence of water.
- When BF3 interacts with water, it does not undergo complete hydrolysis. Instead, it forms an addition product (BF3OH), indicating that it does not fully react with water.

4. **Conclusion**: Since BF3 does not undergo hydrolysis completely and forms an addition product instead, it shows the least tendency towards hydrolysis compared to other compounds that may be more reactive with water.

### Final Answer:
**BF3 (Boron Trifluoride) shows the least tendency towards hydrolysis.**

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