Question:medium

Arrange the following in decreasing order of their boiling points (A) 2-Methylbutane (B) 2,2-Dimethylpropane (C) Pentane (D) Hexane

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For boiling points of alkanes: 1. Higher molar mass means higher boiling point. 2. For isomers (same molar mass), more branching means a more compact shape, less surface area, weaker van der Waals forces, and thus a lower boiling point. Straight-chain isomers always have the highest boiling point among isomers.

Updated On: Mar 30, 2026

D>C>A>B
B>A>C>D
D>A>C>B
B>C>A>D

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The Correct Option is A

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