# A flask contains a mixture of isohexane and

Question:

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

1. simple distillation, 3 -methylpentane

2. simple distillation, isohexane

3. fractional distillation, isohexane

4. fractional distillation, 3-methylpentane

Correct Option: , 3

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.