Which among the following compounds on hydrolysis does not form HCl as one of the product?

Options

A. `AlCl_(3)`
B. `NCl_(3)`
C. `PCl_(3)`
D. `BCl_(3)`

Answer

To determine which compound among the given options does not produce HCl upon hydrolysis, we will analyze each compound step by step.

### Step 1: Analyze ALCl3 (Aluminum Chloride)
- **Hydrolysis Reaction**: When aluminum chloride (ALCl3) undergoes hydrolysis, it reacts with water to form aluminum hydroxide and hydrochloric acid.
- **Reaction**:
\[ \text{ALCl}_3 + 3 \text{H}_2\text{O} \rightarrow \text{Al(OH)}_3 + 3 \text{HCl} \]
- **Conclusion**: HCl is formed.

### Step 2: Analyze NCl3 (Nitrogen Trichloride)
- **Hydrolysis Reaction**: When nitrogen trichloride (NCl3) undergoes hydrolysis, it reacts with water to form ammonia and hypochlorous acid.
- **Reaction**:
\[ \text{NCl}_3 + 3 \text{H}_2\text{O} \rightarrow \text{NH}_3 + 3 \text{HOCl} \]
- **Conclusion**: HCl is not formed.

### Step 3: Analyze PCl3 (Phosphorus Trichloride)
- **Hydrolysis Reaction**: When phosphorus trichloride (PCl3) undergoes hydrolysis, it reacts with water to form phosphonic acid and hydrochloric acid.
- **Reaction**:
\[ \text{PCl}_3 + 3 \text{H}_2\text{O} \rightarrow \text{H}_3\text{PO}_3 + 3 \text{HCl} \]
- **Conclusion**: HCl is formed.

### Step 4: Analyze BCl3 (Boron Trichloride)
- **Hydrolysis Reaction**: When boron trichloride (BCl3) undergoes hydrolysis, it reacts with water to form boric acid and hydrochloric acid.
- **Reaction**:
\[ \text{BCl}_3 + 3 \text{H}_2\text{O} \rightarrow \text{H}_3\text{BO}_3 + 3 \text{HCl} \]
- **Conclusion**: HCl is formed.

### Final Conclusion
Among the compounds analyzed, only **NCl3 (Nitrogen Trichloride)** does not produce HCl upon hydrolysis. Therefore, the correct answer is **NCl3**.

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