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JEE Main2012ChemistryChemical Bonding and Molecular StructureActual

In which of the following pairs the two species are not isostructural?

Options

  1. ACO ₃²⁻ and NO ₃⁻
  2. BPCl ₄⁺ and SiCl ₄
  3. CPF ₅ and BrF ₅
  4. DAlF ₆³⁻ and SF ₆

Correct answer

C. PF ₅ and BrF ₅

Step-by-step solution

(1) CO ₃²⁻ & NO ₃⁻ Sp ^2 hybridized, Trigonal planar (2) PCl ₄⁺ & SiCl ₄ Sp ^3 hybridized, Tetrahedral (3) PF ₅ Sp ^3 d hybridized, Trigonal bipyramidal BrF ₅ Sp ^3 d ^2 hybridized, square pyramidal (4) AlF ₆³⁻ & SF ₆ Sp ^3 d ^2 hybridized, octahedral

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