`PbO_(2)+HCl(dil.) overset(warm) to PbCl_(2)darr+Cl_(2)uarr+H_(2)O`

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 determine the type of reaction taking place in the equation \( \text{PbO}_2 + \text{HCl (dil.)} \overset{\text{warm}}{\rightarrow} \text{PbCl}_2 + \text{Cl}_2 + \text{H}_2\text{O} \), we will analyze the oxidation states of the elements involved in the reaction.

### Step 1: Assign Oxidation Numbers
1. **Lead in \( \text{PbO}_2 \)**:
- Let the oxidation number of Pb be \( x \).
- For \( \text{O} \), the oxidation number is \(-2\).
- The equation becomes: \( x + 2(-2) = 0 \)
- Solving gives \( x = +4 \).
- Therefore, the oxidation number of Pb in \( \text{PbO}_2 \) is \( +4 \).

2. **Chlorine in \( \text{HCl} \)**:
- The oxidation number of Cl is \(-1\) (as it is in a compound with H).

3. **Lead in \( \text{PbCl}_2 \)**:
- The oxidation number of Pb here is \( +2 \) (since Cl is \(-1\) and there are two Cl atoms).

4. **Chlorine in \( \text{Cl}_2 \)**:
- In elemental form, the oxidation number of Cl is \( 0 \).

5. **Hydrogen in \( \text{H}_2\text{O} \)**:
- The oxidation number of H is \( +1 \).

6. **Oxygen in \( \text{H}_2\text{O} \)**:
- The oxidation number of O is \(-2\).

### Step 2: Identify Changes in Oxidation States
- **Lead (Pb)** changes from \( +4 \) in \( \text{PbO}_2 \) to \( +2 \) in \( \text{PbCl}_2 \). This indicates a **reduction** (decrease in oxidation state).
- **Chlorine (Cl)** changes from \( -1 \) in \( \text{HCl} \) to \( 0 \) in \( \text{Cl}_2 \). This indicates an **oxidation** (increase in oxidation state).

### Step 3: Classify the Reaction
Since one species (Pb) is being reduced and another species (Cl) is being oxidized, this reaction is classified as a **Redox reaction**.

### Conclusion
The reaction \( \text{PbO}_2 + \text{HCl (dil.)} \rightarrow \text{PbCl}_2 + \text{Cl}_2 + \text{H}_2\text{O} \) is an **intermolecular Redox reaction** because it involves the transfer of electrons between two different reactants.