A : In alkaline medium, `KMnO_(4)` acts as powerful oxidising agent.
R : `KMnO_(4)` reduces to give `Mn^(2+)` in alkaline medium.

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 analyze the assertion and reason provided in the question, we will break down the information step by step.

### Step 1: Understanding the Assertion
The assertion states that in alkaline medium, `KMnO4` acts as a powerful oxidizing agent.

**Explanation**:
- `KMnO4` (Potassium permanganate) is known for its strong oxidizing properties, especially in acidic and alkaline conditions. In alkaline medium, it can indeed act as a powerful oxidizing agent.

### Step 2: Understanding the Reason
The reason states that `KMnO4` reduces to give `Mn^(2+)` in alkaline medium.

**Explanation**:
- In alkaline medium, `KMnO4` is reduced from the Mn in the +7 oxidation state (in `MnO4^-`) to Mn in the +2 oxidation state (`Mn^(2+)`). The half-reaction for this reduction is:

\[ \text{MnO}_4^- + 8 \text{e}^- + 4 \text{H}_2\text{O} \rightarrow \text{Mn}^{2+} + 8 \text{OH}^- \]

### Step 3: Evaluating the Assertion and Reason
Now, we need to evaluate whether both the assertion and reason are true and if the reason correctly explains the assertion.

- The assertion is **true**: `KMnO4` does act as a powerful oxidizing agent in alkaline medium.
- The reason is also **true**: `KMnO4` reduces to `Mn^(2+)` in alkaline medium.

### Conclusion
Both the assertion and reason are true. However, the reason does correctly explain the assertion because the ability of `KMnO4` to act as a powerful oxidizing agent is indeed due to its reduction to `Mn^(2+)` in alkaline conditions.

### Final Answer
Both A and R are true, and R is the correct explanation of A.

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