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MHT CET202523 Apr 2025Evening ShiftChemistryp Block Elements (Group 15, 16, 17 & 18)Actual

What is shape of interhalogen compound so that central halogen exhibits +3 oxidation state?

Options

  1. ATetrahedral
  2. BBent ' T ' shape
  3. CSquare pyramidal
  4. DSquare planer

Correct answer

B. Bent ' T ' shape

Step-by-step solution

Consider ClF₃ where chlorine exhibits a +3 oxidation state. Fluorine's -1 oxidation state gives a total of -3, balanced by chlorine's +3 state. Chlorine has 7 valence electrons. Bonding with three fluorine atoms uses 3 electrons, leaving 4 electrons that form 2 lone pairs. The total electron pairs are 5, resulting in a trigonal bipyramidal electron geometry. Lone pairs occupy equatorial positions to minimize repulsion, forcing the three bonding pairs into a T-shaped molecular geometry. Final answer: B

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