Q. 28

Intermolecular forces between two benzene molecules are nearly of same strength as those between two toluene molecules. For a mixture of benzene and toluene, which of the following are not true?
A. Δmix H = zero

B. Δmix V = zero

C. These will form minimum boiling azeotrope.

D. These will not form ideal solution.

Answer :

A solution of benzene and toluene constitutes an ideal solution. An ideal solution is one that follows Raoult’s Law over the entire range of all concentrations. Raoult’s law states that, “for a solution of volatile liquids the partial vapour pressure of each component of the solution is directly proportional to its mole fraction present in solution.” Ideal solutions have two major properties that the (1) enthalpy of mixing of the pure components to form the solution is zero and (2) the volume of mixing is also zero. Hence ΔmixH = zero and ΔmixV = zero. Hence, option (i) and (ii) are true. Also, since the solution formed is ideal in nature, it does not show positive and negative deviation from Raoult’s law, hence it does not form an azeotrope. Hence, (iii) and (iv) are not true about the solution.

The correct options are (iii) and (iv).

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Solutions - 07Solutions - 07Solutions - 0743 mins
Relative Lowering in Vapour pressure and Elevation in Boiling pointRelative Lowering in Vapour pressure and Elevation in Boiling pointRelative Lowering in Vapour pressure and Elevation in Boiling point56 mins
Colligative properties | Mastering important conceptsColligative properties | Mastering important conceptsColligative properties | Mastering important concepts46 mins
Elevation in BP | A Thorough lectureElevation in BP | A Thorough lectureElevation in BP | A Thorough lecture43 mins
Ideal & Non Ideal Solutions {Concept Class}Ideal & Non Ideal Solutions {Concept Class}Ideal & Non Ideal Solutions {Concept Class}39 mins
Quiz | Depression in Freezing Point - 02Quiz | Depression in Freezing Point - 02Quiz | Depression in Freezing Point - 0241 mins
Rapid Revision | Chapter - SolutionsRapid Revision | Chapter - SolutionsRapid Revision | Chapter - Solutions70 mins
Types of solution on the basis of Raoult's LawTypes of solution on the basis of Raoult's LawTypes of solution on the basis of Raoult's Law44 mins
Learn Depression in Freezing Point in an HourLearn Depression in Freezing Point in an HourLearn Depression in Freezing Point in an Hour35 mins
Non Ideal SolutionsNon Ideal SolutionsNon Ideal Solutions52 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses