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AP EAMCET202125 Aug 2021Evening ShiftChemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Molecular bromine on reaction with three moles of molecular fluorine produces an inter halogen compound. The total number of lone pairs at the central halogen atom is

Options

  1. A3
  2. B2
  3. C1
  4. D0

Correct answer

B. 2

Step-by-step solution

Molecular bromine ( Br ₂ ) on reaction with 3 moles of molecular fluorine ( F ₂ ) , it will produced 2 moles of BrF ₃ . BrF ₃ is interhalogen compound i.e. trifluorobromide. Br ₂(g)+3 ~F ₂(g) Trifluoro-bromide 2 BrF ₃(g) BrF ₃= 7 e⁻+3 e⁻ 2 = 10 2 e⁻=5 e⁻ i.e. s p^3 d hybridisation. BrF ₃ contain 3 Br - F ⁻ covalent bonds and 2 lone pairs. BrF ₃ is s p^3 d hybridised molecule having T-shape. Hence, total number of lone pairs at central halogen atom is 2.

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