JEE Main Chemistry question

The highest boiling point is expected for [DCE 2003]

(A)-butane
(B)*iso*-octane
(C)-octaneCorrect
(D)2,2,3,3-tetramethylbutane

Answer: (C)

Solution

Among unbranched alkanes, boiling point rises with chain length (greater surface area, stronger van der Waals forces); branching lowers boiling point for a given carbon count. -Octane is

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Question ID VK-142211