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MHT CET202520 Apr 2025Evening ShiftChemistryChemical Bonding and Molecular StructureActual

What is shape of BrF ₅ molecule?

Options

  1. ATrigonal pyramidal
  2. BSquare planer
  3. CSquare pyramidal
  4. DBent 'T' shape

Correct answer

C. Square pyramidal

Step-by-step solution

Using VSEPR theory, the shape of BrF ₅ is determined by its electron and molecular geometries. Bromine contributes 7 valence electrons, and each fluorine contributes 7, for a total of 1 7 + 5 7 = 42 valence electrons. Five single bonds use 5 2 = 10 electrons. The remaining 42 - 10 = 32 electrons are allocated as lone pairs. Each fluorine requires 6 electrons to complete its octet, using 5 6 = 30 electrons. The final 32 - 30 = 2 electrons form one lone pair on bromine. Thus, bromine has 5 bonding pairs and 1 lone pa

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