Oxyacid formed when `BCl_(3)` hydrolysed is

Options

A. `HBO_(2)`
B. `H_(2)B_(4)O_(7)`
C. `H_(3)BO_(3)`
D. None of these

Answer

To determine the oxyacid formed when BCl₃ (boron trichloride) is hydrolyzed, we can follow these steps:

### Step 1: Understand Hydrolysis of BCl₃
When BCl₃ is hydrolyzed, it reacts with water (H₂O) to form boric acid and hydrochloric acid.

### Step 2: Write the Hydrolysis Reaction
The hydrolysis reaction can be represented as:
\[ \text{BCl}_3 + 3 \text{H}_2\text{O} \rightarrow \text{H}_3\text{BO}_3 + 3 \text{HCl} \]
In this reaction, boric acid (H₃BO₃) is formed along with hydrochloric acid (HCl).

### Step 3: Identify the Oxyacid
An oxyacid is defined as an acid that contains oxygen, hydrogen, and another element. In this case, boric acid (H₃BO₃) fits this definition as it contains:
- Hydrogen (H)
- Oxygen (O)
- Boron (B)

### Step 4: Conclusion
Thus, the oxyacid formed when BCl₃ is hydrolyzed is boric acid, which is represented by the formula H₃BO₃.

### Final Answer
The correct option for the oxyacid formed when BCl₃ is hydrolyzed is **H₃BO₃** (option C).

---