Classification Of Solids

In solid state, PCl 5 forms an ionic compound. The phosphorus atom (P) has an empty 3d orbital and can expand its octet to form a compound with more than four bonds. In PCl 5, it forms five bonds with chlorine atoms, but in the solid state, it forms an ionic compound by losing one electron to form a cation [PCl 4] + and gaining an electron to form an anion [PCl 6] - . Why is option (C) correct? PCl 5 forms an ionic compound in the solid state. The cation formed is [PCl 4] + and the anion formed is [PCl 6] - . Why are the other options incorrect? Option (A): PCl 5 does not have an octahedral structure in the solid state. Option (B): The ions are reversed. The correct ions are [PCl 4] + and [PCl 6] - . Option (D): PCl 5 does not form a covalent solid in the form of P 2 Cl 10 . Conclusion: The correct answer is (C) Ionic solid with [PCl 4] + and [PCl 6] - because PCl 5 forms an ionic compound in the solid state with these specific ions.

Chapter Questions
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