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A flask contains a mixture of isohexane (boiling point $60 ° C$ ) and 3-methyl pentane. (boiling point $63 ° C$ ). What is the best way to separate the two liquids and which one will be distilled out first?

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Fractional distillation, 3-methyl pentane

Simple distillation, isohexane

Fractional distillation, isohexane

Simple distillation, 3-methyl pentane.

answer is A.

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Detailed Solution

The difference in the b.pt of two liquids is very small hence fractional distillation method is used, Liquids having lower b.pt comes out first. Therefore iso-hexane (bpt $60^{\circ} C$ ) comes out first.

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