In crystalline state $P C l_{5}$ exists as :

[P C l_{4}]^{+} C l^{-}

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[P C l_{4}]^{+} [P C l_{6}]^{-}

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[P C l_{3}]^{2 +} + 2 C l^{-}

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[P C l_{6}]^{+} [P C l_{4}]^{-}

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Solution

The correct option is B $[P C l_{4}]^{+} [P C l_{6}]^{-}$
In solid state, $P C l_{5}$ prefers to exist as oppositely charged ions like $[P C l_{4}]^{+} [P C l_{6}]^{-}$ as ionic bonding enhances the crystalline nature. Also, $[P C l_{4}]^{+}$ is tetrahedral while $[P C l_{6}^{-}]$ is octahedral. These structures fit well into each other providing extra stability to the solid structure.

Hence, the correct option is (B).

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Similar questions

In solid state $P C l_{5}$ exists as

P C l_{5}

[P C l_{4}]^{+} [P C l_{6}]^{-}

P C l_{5} (s)

P C l_{4}^{+}

P C l_{6}^{-}

P C l_{5}

P C l_{4}^{+}

P C l_{6}^{-}

2 P C l_{5} ⇌ P C l_{4}^{+} + P C l_{6}^{-}

P C l_{5}

[P C l_{4}]^{+} [P C l_{6}]^{-}

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