Select the correct statements about hydrolysis of `BCl_(3) and NCl_(3)`:

Options

A. `NCl_(3)` is hydrolysed and gives HOCl but `BCl_(3)` is not hydrolysed
B. Both `NCl_(3) and BCl_(3)` on hydrolysis gives HCl
C. `NCl_(3)` on hydrolysis give HOCl but `BCl_(3) ` gives HCl
D. Both `NCl_(3) and BCl_(3)` on hydrolysis gives HOCl

Explanation

To analyze the hydrolysis of BCl₃ and NCl₃, we can break down the reactions and their products step by step.

### Step 1: Hydrolysis of BCl₃
1. **Reaction Setup**: BCl₃ reacts with water (H₂O).
2. **Chemical Reaction**:
\[ BCl_3 + 3H_2O \rightarrow H_3BO_3 + 3HCl \]
3. **Products**: The products of this reaction are boric acid (H₃BO₃) and hydrochloric acid (HCl).

### Step 2: Hydrolysis of NCl₃
1. **Reaction Setup**: NCl₃ also reacts with water.
2. **Chemical Reaction**:
\[ NCl_3 + 3H_2O \rightarrow NH_3 + 3HOCl \]
3. **Products**: The products of this reaction are ammonia (NH₃) and hypochlorous acid (HOCl).

### Step 3: Analyzing the Statements
Now, we will evaluate the statements regarding the hydrolysis of BCl₃ and NCl₃:

1. **Statement 1**: NCl₃ is hydrolyzed to give HOCl, but BCl₃ gives SCl.
- **Evaluation**: This statement is false. BCl₃ does not produce SCl; it produces HCl.

2. **Statement 2**: Both NCl₃ and BCl₃ hydrolysis give SCl.
- **Evaluation**: This statement is false. Neither compound produces SCl upon hydrolysis.

3. **Statement 3**: NCl₃ on hydrolysis gives HOCl, but BCl₃ gives HCl.
- **Evaluation**: This statement is true. NCl₃ produces HOCl, and BCl₃ produces HCl.

4. **Statement 4**: Both NCl₃ and BCl₃ on hydrolysis give HOCl.
- **Evaluation**: This statement is false. Only NCl₃ produces HOCl; BCl₃ produces HCl.

### Conclusion
The correct statement about the hydrolysis of BCl₃ and NCl₃ is:
- **Statement 3**: NCl₃ on hydrolysis gives HOCl, but BCl₃ gives HCl.