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MHT CET202520 Apr 2025Morning ShiftChemistryChemical Bonding and Molecular StructureActual

Identify a molecule having highest number of lone pair of electrons in valence shell of central atom.

Options

  1. ANH ₃
  2. BSF ₄
  3. CICl ₃
  4. DPCl ₃

Correct answer

C. ICl ₃

Step-by-step solution

The number of lone pairs on the central atom is determined by applying VSEPR theory to each molecule's Lewis structure. For a central atom with valence electrons V and bonding pairs b , lone pairs are obtained from V - b 2 . For NH ₃ , nitrogen has V=5 and b=3 , yielding 1 lone pair. For SF ₄ , sulfur has V=6 and b=4 , yielding 1 lone pair. For ICl ₃ , iodine has V=7 and b=3 , yielding 2 lone pairs. For PCl ₃ , phosphorus has V=5 and b=3 , yielding 1 lone pair. ICl ₃ has the highest number of lone pairs. Final Answ

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