The solid exists as
As we learnt in
Structure of phosphorus pentachloride -
Trigonal bipyramidal structure (liquid and gas). In solid state as is tetrahedral and is octahedral.
- wherein
In solid state Phosphorus Pentochloride exists as is thetrahedral and is Octahedral.
Option 1)
This option is incorrect
Option 2)
This option is incorrect
Option 3)
This option is incorrect
Option 4)
This option is correct