Give chemical reaction in support of the statement that all the bonds in `PCl` molecule are not equivalent.

Explanation

To demonstrate that not all bonds in the PCl5 molecule are equivalent, we can analyze the structure of PCl5 and provide a chemical reaction that illustrates the difference in bond strength and length between the axial and equatorial bonds.

### Step-by-Step Solution:

1. **Understanding the Structure of PCl5**:
- Phosphorus pentachloride (PCl5) has a trigonal bipyramidal structure. In this structure, there are five chlorine atoms bonded to a central phosphorus atom.
- The three chlorine atoms in the equatorial plane are referred to as equatorial bonds, while the two chlorine atoms above and below the plane are referred to as axial bonds.

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