Chemistry Chemistry In Every Day Life ( Not In Syllabus ) JEE (Main) / AIEEE Problems (Previous Year) Single Correct MCQ
Published on: August 13, 2026

A flask contains a mixture of isohexane and 3-methylpentane. One of the liquids boils at 63ºC while the other boils at 60ºC. What is the best way to seperate the two liquids and which one will be distilled out first ?

A
simple distillation, isohexane
B
simple distillation, 3-methylpentane
C
fractional distillation, 3-methylpentane
D
fractional distillation, isohexane

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The correct answer is:
D

Liquid having lower boiling point comes out first in fractional distillation. Fractional distillation is generally used if boiling point difference is small.(Boiling point of 3-methylpentane = 63°C, isohexane = 60°C)

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