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Per NCERT §4.1.5, which examples illustrate an EXPANDED octet (more than 8 e⁻ around central atom)?
ACH₄ and CCl₄
BPF₅ (10 e⁻ around P) and SF₆ (12 e⁻ around S) — use 3d orbitals
CH₂O and NH₃
DO₂ and N₂
Answer & Solution
Correct answer: B. PF₅ (10 e⁻ around P) and SF₆ (12 e⁻ around S) — use 3d orbitals
Per NCERT §4.1.5, period 3 + beyond have 3d available → PF₅ 10, SF₆ 12. Other examples H₂SO₄, coordination compounds.
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