MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Organic ChemistryHydrocarbonsPreparation & Properties of Alkanes

The highest boiling point is expected for

A.iso-butane

B.n-octane✓ Correct

C.2, 2, 3, 3-tetramethyl butane

D.2-methyl pentane

Explanation

n-octane has a more linear chain that corresponds to intermolecular forces of attraction. The structure of n- octane is as follows: 3 2 2 2 2 2 2 3 CH –CH –CH –CH –CH –CH –CH –CH Therefore,it has the highest boiling point.

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