Chemistry - Liquid Solution Question with Solution | TestHub

ChemistryLiquid SolutionRaoult's LawMedium2 minQB

ChemistryMediummultiple choice

Passage / Comprehension

Answer the questions (given below) which are based on the following diagram. Consider some facts about the above phase diagram : Vapour pressure diagram for real solutions of two liquids A and B that exhibit a positive deviation from Raoult's law. The vapour pressure of both A and B are greater than predicted by Raoult's law. The dashed lines represented the plots for ideal solutions.

$S_{1}$ : This is observed when $A \dots B$ attractions are greater than average of $A \dots A$ and $B \dots B$ attraction:

$S_{2}$ : $Δ H_{mi x} = + v e$ , $Δ V_{mi x} = + v e$

$S_{3}$ : Boiling point is smaller than expected, such that vaporization is increased.

$S_{4}$ : The mixture can form an azeotropic mixture.

Which of the following options are correct?

Options:(select one or more)

Answer:

B, C, D

Solution:

$S_{2}, S_{3}$ and $S_{4}$ are the conditions and facts for positive deviation from Raoult's law. $(S_{1})$ is incorrect.

Because $A - B$ attractive force should be weaker than $A - A$ and $B - B$ attractive forces.

Stream:JEESubject:ChemistryTopic:Liquid SolutionSubtopic:Raoult's Law

⏱ 2mℹ️ Source: QB

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