First slide

General discussion of solutions

Question

Boiling point composition diagram of the liquid-vapour equilibrium for A and ^B is shown in the figure. If a binary liquid mixture of A and B is distilled fractionally, which of the following would be correct observation?

Moderate

A

Composition of the stll (residue) will approach pure liquid B only
B

Composition of the distillate will approach pure A only
C

Composition of distillate and residue will approach pure A and B respectively
D

Neither of the component can be obtained in pure state

Solution

$T °_{B} > T °_{A} [F r o m d i a g r a m] B \to R e s i d u e A \to D i s t i l l a t e$

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