A : Lithium is less reactive but the strogest reducing agent in aqueous solution.
R : Lithium shows positive reduction potential.

Options

A. If both Assertion & Reason are true and the reason is the correct explanantion of the assertion, then mark (1).
B. If both Assertion & Reason are true and the reason is the correct explanantion of the assertion, then mark (2).
C. If Assertion is true statement but Reason is false. Them mark (3).
D. If both Assertion and reason are false statement, then mark (4).

Answer

To analyze the given statements regarding lithium, we will break down the assertion (A) and the reason (R) step by step.

### Step 1: Understanding the Assertion
- **Assertion (A)**: "Lithium is less reactive but the strongest reducing agent in aqueous solution."
- Lithium is indeed less reactive compared to other alkali metals like sodium and potassium. However, it is known to be a strong reducing agent. This is because it can easily lose its outermost electron, which is characteristic of reducing agents.

### Step 2: Evaluating the Reason
- **Reason (R)**: "Lithium shows positive reduction potential."
- The reduction potential of lithium is actually negative. For lithium, the standard reduction potential is approximately -3.04 volts. This means that lithium does not favor reduction (gaining electrons) in aqueous solution; instead, it readily loses electrons, which is why it acts as a strong reducing agent.

### Step 3: Conclusion
- Since the assertion is correct (lithium is less reactive but a strong reducing agent), but the reason is incorrect (lithium does not have a positive reduction potential), we conclude that:
- Assertion (A) is true.
- Reason (R) is false.

### Final Answer
- The correct answer is that the assertion is true, but the reason is false.

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