Which of the following statement is/are correct?

Options

A. `B(OH)_(3)` partially reacts with water to form `H_(3)O^(+)` and `[B(OH_(4))]^(-)` and behaves like a weak acid
B. `B(OH)_(3)` behaves like a strong monobasic acid in presence of sugars and this acid can be titrated against NaOH solution using phenolphthalein as an indicator
C. `B(OH)_(3)` does not donate a proton and hence does not form any salt with NaOH
D. `B(OH)_(3)` reacts with NaOH, forming `Na[B(OH)_(4)]`

Answer

To determine which of the statements regarding BOH₃ (orthoboric acid) are correct, we will analyze each statement step by step.

### Step 1: Analyze the first statement
**Statement:** BOH₃ partially reacts with water to form H₃O⁺ and BOH₄⁻. BOH₄⁻ behaves like a weak acid.

**Analysis:**
- When BOH₃ dissolves in water, it can react to form H₃O⁺ and BOH₄⁻.
- BOH₄⁻ can indeed act as a weak acid because it can donate a proton (H⁺) in solution.

**Conclusion:** This statement is correct.

### Step 2: Analyze the second statement
**Statement:** BOH₃ behaves like a strong monobasic acid in the presence of sugar.

**Analysis:**
- In the presence of sugar, BOH₃ can exhibit stronger acidic behavior due to the formation of complexes.
- It can be titrated with NaOH, indicating that it behaves like a strong acid in this context.

**Conclusion:** This statement is correct.

### Step 3: Analyze the third statement
**Statement:** BOH₃ does not donate a proton and hence does not form any salt with NaOH.

**Analysis:**
- This statement is incorrect because BOH₃ does donate a proton when it reacts with NaOH.
- The reaction with NaOH leads to the formation of NaBO₄, indicating that it does form a salt.

**Conclusion:** This statement is incorrect.

### Step 4: Analyze the fourth statement
**Statement:** BOH₃ reacts with NaOH to form NaBO₄.

**Analysis:**
- When BOH₃ reacts with NaOH, it indeed forms NaBO₄.
- This confirms that the reaction occurs and a salt is formed.

**Conclusion:** This statement is correct.

### Final Conclusion
Based on the analysis:
- The correct statements are: **A (first statement), B (second statement), and D (fourth statement)**.
- The incorrect statement is: **C (third statement)**.

### Summary of Correct Statements
- A: Correct
- B: Correct
- C: Incorrect
- D: Correct

### Final Answer: A, B, and D are correct.

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