Assertion : $P {C l}_{5}$ is a covalent in gaseous and liquid states but ionic in solid state. Reason: $P {C l}_{5}$ in solid state consists of tetrahedral $P {C l}_{4}^{+}$ cation and octahedral $P {C l}_{6}^{-}$ anion.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
$P {C l}_{5}$ is trigonal bipyramidal containing ${s p}^{3} d$ hybridised $P$ atom in liquid and gaseous states whereas in solid state it consists of tetrahedral $P {C l}_{4}^{+}$ cation and octahedral $P {C l}_{6}^{-}$ anion.

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Assertion :PCl5 is a covalent in gaseous and liquid states but ionic in solid state. Reason: PCl5 in solid state consists of tetrahedral PCl+4 cation and octahedral PCl−6 anion.

Assertion : $P {C l}_{5}$ is a covalent in gaseous and liquid states but ionic in solid state. Reason: $P {C l}_{5}$ in solid state consists of tetrahedral $P {C l}_{4}^{+}$ cation and octahedral $P {C l}_{6}^{-}$ anion.