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MHT CET20244 May 2024Morning ShiftChemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Which of the following is correct decreasing order of boiling point of compounds?

Options

  1. ACH ₃ Cl CH ₃ Br CH ₂ Br ₂ CHBr ₃
  2. BCH ₃ Br CH ₂ Br ₂ CHBr ₃ CH ₃ Cl
  3. CCHBr ₃ CH ₂ Br ₂ CH ₃ Br CH ₃ Cl
  4. DCH ₃ Br CH ₃ Cl CHBr ₃ CH ₂ Br ₂

Correct answer

C. CHBr ₃ CH ₂ Br ₂ CH ₃ Br CH ₃ Cl

Step-by-step solution

The comparative boiling points of halogen derivatives are related to van der Waals forces of attraction which depend upon molecular size. The molecular size depends upon the size of halogen and number of halogen atoms. Thus, for the given compounds, boiling point decreases as, CHBr ₃ CH ₂ Br ₂ CH ₃ Br CH ₃ Cl .

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