Statement-I: ${\mathrm{PF}}_5$ keeps trigonal bipyramidal structure in gas as well as in solid state.

Statemeot-2:  ${\mathrm{PCl}}_5$ in gas and liquid state is covalent but in solid state it is ionic and exist as

${\left[{\mathrm{PCl}}_4\right]}^{+}$ and ${\left[{\mathrm{PCl}}_6\right]}^{-}$

${\mathrm{PF}}_5$ keeps trigonal bipyramidal structure in gas as well as in solid state Because, ${\mathrm{PF}}_5$ is trigonal bipyramidal and contains an $s{p}^{3}d$ hybridised P atom in the liquid and gaseous states; in the solid state, it is composed of the cations tetrahedral ${\mathrm{PCl}}_4$  and anion octahedral ${\mathrm{PCl}}_6$.

In its solid state, ${\mathrm{PCl}}_5$ is composed of the octahedral ${{\mathrm{PCl}}_6}^{-}$ anion and the tetrahedral ${\mathrm{PCl}}_4+$ cation. In its liquid and gaseous states, PCl5 is a trigonal bipyramidal structure featuring an sp3d hybridised P atom. Read more at Sarthaks.com: assertion-${{\mathrm{pcl}}_5}^{-}$is-covalent-in-gaseous-and-liquid-states-but-ionic-in-solid-state.