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Question: Answered & Verified by Expert
The species that cannot exist is
ChemistryChemical Bonding and Molecular StructureJEE Main
Options:
  • A SiF62-
  • B BF63-
  • C SF6
  • D AlF63-
Solution:
2148 Upvotes Verified Answer
The correct answer is: BF63-
As Boron does not have d orbital in its valence orbit. Hence, maximum covalency of boron cannot exceed more than 4 so BF63- does not exist. Rest all exist as Si, S,Al have d- orbitals to exceed covalency more than 4.

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