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Question: Answered & Verified by Expert
In the solid state, $\mathrm{PCl}_{5}$ exists as
Chemistryp Block Elements (Group 15, 16, 17 & 18)WBJEEWBJEE 2016
Options:
  • A $\left[\mathrm{PCl}_{4}\right]^{-}$ and $\left[\mathrm{PCl}_{6}\right]^{+}$ ions
  • B covalent $\mathrm{PCl}_{5}$ molecules only
  • C $\left[\mathrm{PCl}_{4}\right]^{+}$ and $\left[\mathrm{PCl}_{6}\right]^{-}$ ions
  • D covalent $\mathrm{P}_{2} \mathrm{Cl}_{10}$ molecules only
Solution:
2690 Upvotes Verified Answer
The correct answer is: $\left[\mathrm{PCl}_{4}\right]^{+}$ and $\left[\mathrm{PCl}_{6}\right]^{-}$ ions
$\mathrm{PCl}_{5}$ exists as $\left[\mathrm{PCl}_{4}\right]^{+}$ and $\left[\mathrm{PCl}_{6}\right]^{-}$ in solid state.
$$
2 \mathrm{PCl}_{5} \longrightarrow\left[\mathrm{PCl}_{4}\right]^{+}\left[\mathrm{PCl}_{6}]^{-}\right.
$$

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