Assertion : Sulphur is oxidised by `H_(2)O_(2)` in presence of Fe(III)
Reason :- Fe(III) oxidises sulphur to sulphate

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are False.

Answer

To solve the assertion-reason question, we will analyze both the assertion and the reason step by step.

### Step 1: Understand the Assertion
The assertion states that "Sulphur is oxidized by H2O2 in presence of Fe(III)."

- **Explanation**: In this reaction, hydrogen peroxide (H2O2) acts as an oxidizing agent. When it reacts with sulfur in the presence of ferric ions (Fe³⁺), it facilitates the oxidation of sulfur.

### Step 2: Analyze the Reaction
The reaction can be represented as:
\[ \text{S} + \text{H}_2\text{O}_2 + \text{Fe}^{3+} \rightarrow \text{SO}_4^{2-} + \text{Fe}^{2+} + \text{H}_2\text{O} \]

- **Oxidation States**:
- Sulfur (S) in its elemental form has an oxidation state of 0.
- In sulfate (SO₄²⁻), sulfur has an oxidation state of +6.

This indicates that sulfur is being oxidized from 0 to +6.

### Step 3: Understand the Reason
The reason states that "Fe(III) oxidizes sulfur to sulfate."

- **Explanation**: Ferric ions (Fe³⁺) can indeed facilitate the oxidation of sulfur to sulfate (SO₄²⁻). In the process, Fe³⁺ is reduced to Fe²⁺.

### Step 4: Conclusion
Both the assertion and the reason are correct:
- Sulfur is oxidized by H2O2 in the presence of Fe³⁺.
- Fe³⁺ does oxidize sulfur to sulfate.

### Final Answer
Both assertion and reason are correct, and the reason is the correct explanation for the assertion.