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  4. A flask contains a mixture of isohexane and 3-methylpentane. One of the liquids boils at 63 °C while the other boils at 60 °C. What is the best way to separate the two liquids and which one w ill be distilled out first ?

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Q. A flask contains a mixture of isohexane and $3$-methylpentane. One of the liquids boils at $63 ^{\circ}$C while the other boils at $60 ^{\circ}$C. What is the best way to separate the two liquids and which one w ill be distilled out first ?

JEE MainJEE Main 2020Organic Chemistry – Some Basic Principles and Techniques

Solution:

Liquid which have less difference in boiling point can be isolated by fractional distillation and liquid with less boiling point will be isolated first.