`P_(4)+10Cl_(2)overset(Delta)toPCl_(5)`

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 solve the question regarding the reaction \( P_4 + 10Cl_2 \overset{\Delta}{\rightarrow} PCl_5 \), we will analyze the oxidation states of the elements involved and determine the type of reaction.

### Step-by-Step Solution:

1. **Identify the Reactants and Products**:
- Reactants: \( P_4 \) (tetraphosphorus) and \( Cl_2 \) (chlorine gas).
- Product: \( PCl_5 \) (phosphorus pentachloride).

2. **Assign Oxidation States**:
- In \( P_4 \), phosphorus (P) is in its elemental form, so its oxidation state is 0.
- In \( Cl_2 \), chlorine (Cl) is also in its elemental form, so its oxidation state is 0.
- In \( PCl_5 \), chlorine has an oxidation state of -1 (since there are 5 Cl atoms, the total contribution is -5), which means phosphorus must have an oxidation state of +5 to balance the overall charge (0).

3. **Determine Changes in Oxidation States**:
- Phosphorus changes from 0 in \( P_4 \) to +5 in \( PCl_5 \). This indicates that phosphorus is oxidized.
- Chlorine changes from 0 in \( Cl_2 \) to -1 in \( PCl_5 \). This indicates that chlorine is reduced.

4. **Classify the Reaction**:
- Since one species (P) is oxidized and another species (Cl) is reduced, this reaction is classified as a **redox reaction**.
- Additionally, because two reactants combine to form a single product, this reaction is also classified as a **combination reaction**.

5. **Thermal Aspect**:
- The reaction is indicated to occur with heat (denoted by \( \Delta \)), which confirms that it is a **thermal combination reaction**.

6. **Final Classification**:
- The reaction is a **redox reaction** and a **thermal combination reaction**.

### Summary:
The reaction \( P_4 + 10Cl_2 \overset{\Delta}{\rightarrow} PCl_5 \) is a redox reaction and a thermal combination reaction.