`NaI+MnO_(2)+H_(2)SO_(4)(Conc.) to MnSO_(4)+I_(2)uarr`

Options

A. For disproportionation reaction.
B. For comproportionation reaction.
C. For either intermolecular redox reaction or displacement reaction
D. For either thermal combination redox reaction or thermal decomposition redox reaction.

Answer

To analyze the reaction \( \text{NaI} + \text{MnO}_2 + \text{H}_2\text{SO}_4 \text{(Conc.)} \rightarrow \text{MnSO}_4 + \text{I}_2 \), we can follow these steps:

### Step 1: Identify the Reactants and Products
The reactants in this reaction are sodium iodide (NaI), manganese dioxide (MnO2), and concentrated sulfuric acid (H2SO4). The products are manganese sulfate (MnSO4) and iodine (I2).

### Step 2: Determine the Oxidation States
- In NaI, the oxidation state of iodine (I) is -1.
- In MnO2, the oxidation state of manganese (Mn) is +4.
- In H2SO4, the oxidation state of sulfur (S) is +6.
- In MnSO4, the oxidation state of manganese (Mn) is +2.
- In I2, the oxidation state of iodine (I) is 0.

### Step 3: Analyze Changes in Oxidation States
- **Iodine**: Changes from -1 in NaI to 0 in I2. This is an increase in oxidation state, indicating that iodine is being oxidized.
- **Manganese**: Changes from +4 in MnO2 to +2 in MnSO4. This is a decrease in oxidation state, indicating that manganese is being reduced.

### Step 4: Classify the Reaction
Since both oxidation and reduction occur simultaneously, this is classified as a redox reaction. Specifically, it involves the oxidation of iodine and the reduction of manganese.

### Step 5: Determine the Type of Redox Reaction
In this case, the reaction can be classified as a disproportionation reaction because one species (iodine) is being oxidized while another species (manganese) is being reduced. However, since the question provides options, we can conclude that the correct classification is that it is an intermolecular redox reaction.

### Final Answer
The reaction \( \text{NaI} + \text{MnO}_2 + \text{H}_2\text{SO}_4 \text{(Conc.)} \rightarrow \text{MnSO}_4 + \text{I}_2 \) is classified as an **intermolecular redox reaction**.

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