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MHT CET202619 April 2026Evening ShiftChemistryChemical Bonding and Molecular StructureActual

Which is the correct decreasing order of boiling points for different compounds from following ?

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. CCH ₂ Br ₂ > CHBr ₃ > CH ₃ Br > CH ₃ Cl
  4. DCHBr ₃ > CH ₂ Br ₂ > CH ₃ Br > CH ₃ Cl

Correct answer

D. CHBr ₃ > CH ₂ Br ₂ > CH ₃ Br > CH ₃ Cl

Step-by-step solution

The boiling point of haloalkanes increases with an increase in the molecular mass and the size of the halogen atom due to the stronger van der Waals forces of attraction. Comparing the given compounds: CH ₃ Cl has one chlorine atom. CH ₃ Br has one bromine atom, which is heavier and larger than chlorine. CH ₂ Br ₂ has two bromine atoms. CHBr ₃ has three bromine atoms. The molecular mass follows the order: CHBr ₃ > CH ₂ Br ₂ > CH ₃ Br > CH ₃ Cl . Therefore, the decreasing order of boiling points is CHBr ₃ > CH ₂ Br

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