Q47 / 180 · NEET 2019 (All India) · Chemistry

Identify the incorrect statement related to PCl5 from the following:

  • A
    Three equatorial P-Cl bonds make an angle of 120o with each other
  • B
    Two axial P-Cl bonds make an angle of 180o with each other
  • C
    Axial P-Cl bonds are longer than equatorial P-Cl bonds
  • Correct answer
    D
    PCl5 molecule is non-reactive

Solution

Figure
(i) Three equatorial P-Cl bonds make an angle of 120° with each other is correct.

(ii) Two axial P-Cl bonds make an angle of 180° with each other.

(iii) Axial P-Cl bonds are longer than equatorial because according to Bent’s rule the hybrid orbitals that contain more p-character or less s-character are placed on axial position and have more bond length.

(iv) PCl5 molecule is reactive (W) is the incorrect answer.

Hence, the correct answer is option: 'D'.

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