Assertion : Ions like ` HCO_3^(-) ` ,etc. ,act as Bronsted -Lowry acid .
Reason: Such ions are able to funish protons in solutions.
(a)If both Assertion and Reason are CORRECT and a Reason is the CORRECT explanations of the Assertion
(b)If both Assertion and Reason are CORRECT but Reason is not CORRECT explanation of the Assertion.
(c)If Assertion is CORRECT but Reason is INCORRECT.
(d)If Assertion is INCORRECT but Reason is CORRECT.

Options

A. If both Assertion and Reason are CORRECT and a Reason is the CORRECT explanations of the Assertion
B. If both Assertion and Reason are CORRECT but Reaon is not CORRECT explanation of the Assertion.
C. If Assertion is CORRECT but Reasson is INCORRECT.
D. If Assertion is INCORRECT but Reason is CORRECT.

Answer

To solve the question, we need to analyze the assertion and reason provided:

**Assertion**: Ions like \( HCO_3^{-} \) act as Bronsted-Lowry acids.
**Reason**: Such ions are able to furnish protons in solutions.

### Step-by-Step Solution:

1. **Understanding the Bronsted-Lowry Theory**:
- According to the Bronsted-Lowry theory, an acid is defined as a substance that can donate a proton (H⁺ ion), while a base is a substance that can accept a proton.

2. **Analyzing the Assertion**:
- The assertion states that \( HCO_3^{-} \) (bicarbonate ion) acts as a Bronsted-Lowry acid.
- This is true because \( HCO_3^{-} \) can donate a proton to form \( CO_3^{2-} \) (carbonate ion). Therefore, the assertion is correct.

3. **Analyzing the Reason**:
- The reason states that such ions are able to furnish protons in solutions.
- This is also true, as \( HCO_3^{-} \) can indeed release a proton (H⁺) in solution, confirming that it can act as an acid. Thus, the reason is correct.

4. **Determining the Relationship**:
- Since both the assertion and the reason are correct, we need to check if the reason correctly explains the assertion.
- The reason explains that \( HCO_3^{-} \) can furnish protons, which directly supports the assertion that it acts as a Bronsted-Lowry acid.

5. **Conclusion**:
- Both the assertion and the reason are correct, and the reason provides the correct explanation for the assertion. Therefore, the correct answer is:
- **(a)** If both Assertion and Reason are CORRECT and Reason is the CORRECT explanation of the Assertion.