Which of the following is correct representation of reaction of acidified permanganate solution with sulphurous acid ?

Options

A. `2MnO_4^(-)+5SO_3^(2-)+6H^(+)to5SO_4^(2-)+2Mn^(2+)+3H_2O`
B. `MnO_4^(-)+SO_3^(2-)+2H_2OtoS+Mn^(2+)4H^(+)`
C. `2MnO_4^(-)+5SO_3^(2-)+2H_2Oto4SO_4^(2-)+S+2Mn^(2+0+4H^(+)`
D. `3MnO_4^(-)+2SO_3^(2-)+2H_2O to 2S+3Mn^(2+)+4H^(+)`

Answer

To solve the question regarding the correct representation of the reaction between acidified permanganate solution and sulphurous acid, we need to follow these steps:

### Step 1: Identify the Reactants
The reactants in this reaction are:
- Acidified permanganate solution (MnO₄⁻ in acidic medium)
- Sulphurous acid (SO₃²⁻)

### Step 2: Write the Balanced Chemical Equation
In an acidic medium, the reaction of permanganate ions (MnO₄⁻) with sulphurous acid (SO₃²⁻) can be represented as follows:

1. The permanganate ion (MnO₄⁻) is reduced to manganese(II) ion (Mn²⁺).
2. The sulphite ion (SO₃²⁻) is oxidized to sulfate ion (SO₄²⁻).

The balanced equation for this reaction is:
\[ 2 \text{MnO}_4^- + 5 \text{SO}_3^{2-} + 6 \text{H}^+ \rightarrow 5 \text{SO}_4^{2-} + 2 \text{Mn}^{2+} + 3 \text{H}_2\text{O} \]

### Step 3: Identify the Correct Option
Now, we compare the balanced equation with the given options. The correct representation of the reaction will match the balanced equation we derived.

From the analysis, the correct option is:
- **Option 1**: \( 2 \text{MnO}_4^- + 5 \text{SO}_3^{2-} + 6 \text{H}^+ \rightarrow 5 \text{SO}_4^{2-} + 2 \text{Mn}^{2+} + 3 \text{H}_2\text{O} \)

### Conclusion
Thus, the correct representation of the reaction of acidified permanganate solution with sulphurous acid is given by Option 1.

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