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Identify the incorrect statement related...

Identify the incorrect statement related to `PCl_5` from th following:

A

Two axial P-Cl bonds make an angle of `180^@` with each other

B

Axial P-Cl bonds are longer than equatorial P-Cl bonds

C

`PCl_5` molecule is non-reactive

D

Three equatorial P-Cl bonds make an angle of `120^@` with each other

Text Solution

AI Generated Solution

The correct Answer is:
To identify the incorrect statement related to \( PCl_5 \), we can follow these steps: ### Step 1: Understand the Structure of \( PCl_5 \) - Phosphorus pentachloride (\( PCl_5 \)) has a trigonal bipyramidal structure. - In this structure, there are three equatorial chlorines and two axial chlorines. ### Step 2: Analyze the Bond Angles - The bond angles for the equatorial chlorines are \( 120^\circ \) with each other. - The bond angles for the axial chlorines are \( 180^\circ \) relative to each other. ### Step 3: Evaluate the Length of the Bonds - The axial \( P-Cl \) bonds are longer than the equatorial \( P-Cl \) bonds due to the repulsion between the axial and equatorial bonds. ### Step 4: Assess Reactivity - \( PCl_5 \) is known to be reactive, particularly with water, where it can hydrolyze to form \( POCl_3 \) and \( HCl \). - Therefore, any statement claiming that \( PCl_5 \) is non-reactive is incorrect. ### Step 5: Review the Statements - Based on the analysis: 1. The angles between the equatorial bonds are \( 120^\circ \) - **Correct** 2. The axial \( P-Cl \) bonds are longer than the equatorial \( P-Cl \) bonds - **Correct** 3. \( PCl_5 \) is non-reactive - **Incorrect** 4. The angle between the axial \( P-Cl \) bonds is \( 180^\circ \) - **Correct** ### Conclusion The incorrect statement related to \( PCl_5 \) is that it is non-reactive. Thus, the answer is option 3. ---
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