State true or false
Aqueous solutions of borax acts as a buffer.

Explanation

To determine whether the statement "Aqueous solutions of borax act as a buffer" is true or false, we can analyze the components of borax and its behavior in solution.

### Step-by-Step Solution:

1. **Identify Borax**:
- Borax is chemically represented as Na₂B₄O₇·10H₂O.

2. **Understand Buffer Solutions**:
- A buffer solution is one that can resist changes in pH upon the addition of small amounts of acid or base. It typically consists of a weak acid and its conjugate base (or a weak base and its conjugate acid).

3. **Components of Borax**:
- In aqueous solution, borax dissociates to form sodium ions (Na⁺) and borate ions (B(OH)₄⁻).
- The borate ion can act as a weak base, while the weak acid associated with borax is boric acid (H₃BO₃).

4. **Formation of Weak Acid and Salt**:
- When borax is dissolved in water, it can establish an equilibrium with boric acid:
\[ \text{Na}_2\text{B}_4\text{O}_7 + 7\text{H}_2\text{O} \rightarrow 2\text{Na}^+ + 4\text{B(OH)}_4^- + 2\text{H}_3\text{BO}_3 \]
- Here, B(OH)₄⁻ acts as the conjugate base of the weak acid H₃BO₃.

5. **Conclusion**:
- Since borax solution contains a weak acid (H₃BO₃) and its conjugate base (B(OH)₄⁻), it meets the criteria for a buffer solution. Therefore, the statement is **True**.

### Final Answer:
**True** - Aqueous solutions of borax act as a buffer.

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