Question

Identify the incorrect statement about PCl₅:

• A. PCl₅ possesses two different Cl – P – Cl bond angles
• B. All five P – Cl bonds are identical in length
• C. PCl₅ exhibits sp³d hybridisation
• D. PCl₅ consists of five P – Cl (sigma) bonds

Answer 1

The Correct Option is B

PCl₅ exhibits a trigonal bipyramidal structure. Within this structure, the P-Cl bonds are differentiated into two categories:

• Axial P-Cl bonds: These are two bonds situated above and below the central phosphorus atom, characterized by greater length and reduced strength.
• Equatorial P-Cl bonds: These are three bonds forming a trigonal plane around the central phosphorus atom, distinguished by shorter length and increased strength.

Consequently, the assertion that "All five P - Cl bonds are identical in length" is factually inaccurate. The remaining statements are accurate: PCl₅ features two distinct bond angles (90° and 120°), demonstrates sp³d hybridization, and comprises five sigma bonds.