1.

In the solid state PCl_5 exists as

Answer»

`[PCl_4]^(-)` and `[PCl_6]^(+)` IONS
covalent `PCl_5` molecules only
`[PCl_4]^(+)` and `[PCl_6]^(-)` ions
covalent `P_2Cl_(10)` molecules only

SOLUTION :In solid state, for `PCl_5`, following observation is observed.
`2PCl_(5)


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