Respuesta :
Answer: Option (c) is the correct answer.
Explanation:
A binary mixture is defined as the mixture which contains two components in the aqueous medium. The two components are solute and solvent.
And, volatility is defined as the ability of a liquid solution or substance to readily change into vapors.
For a binary solution the expression for relative volatility is as follows.
[tex]\alpha = \frac{\frac{y_{i}}{x_{i}}}{\frac{y_{j}}{x_{j}}}[/tex] = [tex]K_{i}/K_{j}[/tex]
where, [tex]\alpha[/tex] = relative volatility of more volatile component i
[tex]y_{i}[/tex] = vapor-liquid equilibrium concentration of component i in the vapor phase
[tex]x_{i}[/tex] = vapor-liquid equilibrium concentration of component i in the liquid phase
[tex]y_{j}[/tex] = vapor-liquid equilibrium concentration of component j in the vapor phase
[tex]x_{j}[/tex] = vapor-liquid equilibrium concentration of component j in the liquid phase
So, when [tex]\alpha[/tex] > 1 then separation by distillation is easier in nature.
Thus, we can conclude that in order to separate the components of a binary mixture, the relative volatility should be greater than unity.
