Chemistry - CHEMICAL BONDING Question with Solution | TestHub

To determine where all P—Cl bond lengths are identical, we analyze the molecular geometry of each option:

A) PCl₃F₂: In this trigonal bipyramidal structure, the more electronegative F atoms occupy axial positions, leaving all three Cl atoms in identical equatorial positions.

B) PCl₃: This has a trigonal pyramidal geometry where all three P—Cl bonds are chemically equivalent by symmetry.

C) PCl₂F₃: Here, two F atoms take axial spots and one takes an equatorial spot; the two Cl atoms both occupy the remaining equatorial positions, making them identical.

D) PCl₄⁺: This cation has a regular tetrahedral geometry, ensuring all four P—Cl bond lengths are exactly the same.