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  4. The highest boiling point is expected for

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Q. The highest boiling point is expected for

IIT JEEIIT JEE 1986Hydrocarbons

Solution:

Boiling point of alkane increases with molar mass. Among isomeric alkanes, branching decreases boiling point. Therefore, n-octane has highest boiling point, higher than 2, 2, 3, 3-tetramethyl-butane (an isomer of n-octane).