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Question 46

Identify the correct order for the given property for following compounds


Choose the correct answer from the option below:

Solution

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  • (A) Boiling Point: Correct. For homologous series (like alkyl chlorides), boiling point increases with increasing molecular mass (chain length) due to stronger van der Waals forces.
    • Ethyl chloride < Propyl chloride < Butyl chloride
  • (B) Density: Incorrect. Density generally increases with the atomic mass of the halogen (Cl < Br < I). The order shown suggests a bromide is less dense than a chloride, which is incorrect for similar alkyl groups.
  • (C) Boiling Point: Correct. Boiling point increases with molecular mass. A polyhalogenated compound like ($$CBr_4$$ or $$CHBr_3$$) would have a much higher boiling point than ethyl bromide.
  • (D) Density: Incorrect. Density increases with the number of halogen atoms and the mass of the halogen. A compound with both Iodine and Bromine would typically be denser than one with just Chlorine and Bromine.
  • (E) Boiling Point: Correct. For isomeric compounds, branching decreases the surface area, which weakens van der Waals forces and lowers the boiling point.
    • n-butyl chloride > isobutyl chloride > tert-butyl chloride

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