A : Boric acid is weak monobasic acid .
R : Boric acid give one `H^(+)` ion .

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion , then mark (1)
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion , then mark (2)
C. If Assertion is true statement but Reason is false , then mark (3)
D. If both Assertion and Reason are false statements , then mark (4)

Answer

To solve the assertion-reason question regarding boric acid, we will analyze both statements step by step.

### Step 1: Analyze the Assertion
**Assertion (A): Boric acid is a weak monobasic acid.**

- **Explanation**: Boric acid (H₃BO₃) is indeed classified as a weak acid. It does not dissociate completely in solution like strong acids do. Instead, it behaves as a Lewis acid by accepting hydroxide ions (OH⁻) rather than donating protons (H⁺). This characteristic is what makes it a weak acid.

### Step 2: Analyze the Reason
**Reason (R): Boric acid gives one H⁺ ion.**

- **Explanation**: This statement is incorrect. Boric acid does not release H⁺ ions in the same way that traditional acids do. Instead, it reacts with water to form the tetrahydroxyborate ion (B(OH)₄⁻) by accepting hydroxide ions. Therefore, it does not give off H⁺ ions but rather accepts OH⁻ ions.

### Step 3: Conclusion
- The assertion is correct because boric acid is a weak monobasic acid.
- The reason is incorrect because boric acid does not release H⁺ ions; it accepts OH⁻ ions.

### Final Answer
- **Assertion (A) is correct.**
- **Reason (R) is incorrect.**