`P_(4)+6Cl_(2) overset(Delta)toPCl_(3)`

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 represented by the equation \( P_4 + 6Cl_2 \overset{\Delta}{\rightarrow} PCl_3 \), we will analyze the oxidation states of the reactants and products.

### Step-by-Step Solution:

1. **Identify the Reactants and Products:**
- Reactants: \( P_4 \) (tetraphosphorus) and \( Cl_2 \) (chlorine gas).
- Product: \( PCl_3 \) (phosphorus trichloride).

2. **Assign Oxidation States:**
- In \( P_4 \), phosphorus is in its elemental form, so its oxidation state is \( 0 \).
- In \( Cl_2 \), chlorine is also in its elemental form, so its oxidation state is \( 0 \).
- In \( PCl_3 \), the oxidation state of phosphorus is \( +3 \) (since each chlorine has an oxidation state of \( -1 \), and there are three chlorines).

3. **Determine Changes in Oxidation States:**
- Phosphorus changes from \( 0 \) in \( P_4 \) to \( +3 \) in \( PCl_3 \). This indicates oxidation (loss of electrons).
- Chlorine changes from \( 0 \) in \( Cl_2 \) to \( -1 \) in \( PCl_3 \). This indicates reduction (gain of electrons).

4. **Identify the Type of Reaction:**
- Since oxidation (of phosphorus) and reduction (of chlorine) are occurring simultaneously, this is classified as a **redox reaction**.
- Additionally, since both reactants are different species, it is an **intermolecular redox reaction**.

5. **Classify the Reaction Further:**
- The reaction involves the combination of two reactants to form a single product, which is characteristic of a **combination reaction**.
- The reaction is also **thermal** because it requires heat (indicated by \( \Delta \)) to proceed.

6. **Conclusion:**
- The reaction \( P_4 + 6Cl_2 \overset{\Delta}{\rightarrow} PCl_3 \) is both a **redox reaction** and a **thermal combination reaction**.

### Final Answer:
The reaction is classified as an **intermolecular redox reaction** and a **thermal combination reaction**.

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