Assertion : $\mathrm{PCl}_5$ is covalent in gaseous and liquid states but ionic in solid state. Reason :…
Assertion : $\mathrm{PCl}_5$ is covalent in gaseous and liquid states but ionic in solid state.
Reason : $\mathrm{PCl}_5$ in solid state consists of tetrahedral $\mathrm{PCl}_4^{+}$cation and octahedral $\mathrm{PCl}_6^{-}$ anion.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
Solution
$\mathrm{PCl}_5$ is trigonal bipyramidal containing $s p^3 d$ hybridized $\mathrm{P}$ atom in liquid and gaseous states whereas in solid state it consists of tetrahedral $\mathrm{PCl}_4^{+}$cation and octahedral $\mathrm{PCl}_6^{-}$anion.