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A binary solution of liquids A and B deviates positively from Raoult's law. Which of the following statements is NOT true for this solution?
The total vapour pressure of the solution is greater than the ideal vapour pressure.
The intermolecular forces between A-A and B-B are stronger than those between A-B.
The enthalpy of mixing () is positive.
The volume of mixing () is positive.
Which one of the following is TRUE for a solution showing negative deviation from Raoult's law?
A-B interactions are weaker than A-A and B-B interactions
A binary solution of two volatile liquids A and B deviates negatively from Raoult's Law. At a specific composition, the total vapor pressure is minimum. Which of the following statements is FALSE regarding this specific composition?
The vapor and liquid phases have identical compositions.
The boiling point is higher than that of either pure A or pure B.
The system deviates negatively from Raoult's Law.
The mole fraction of A in the vapor is always greater than that of B.
Which of the following mixtures exhibits a positive deviation from Raoult's law?
Ethanol and acetone
Chloroform and acetone
Benzene and toluene
Nitric acid and water
A mixture of liquids A and B shows a vapor pressure higher than predicted by Raoult's law. Which of the following is true about the intermolecular forces between A and B?
The interaction between A and B is stronger than the interaction between A-A and B-B.
The interaction between A and B is weaker than the interaction between A-A and B-B.
The interaction between A and B is similar to the interaction between A-A and B-B.
The interaction between A and B is always weaker than the interaction between A-A and B-B.
Which of the following explains why a mixture showing positive deviation from Raoult's law has a higher vapor pressure than expected?
The intermolecular forces between unlike molecules are stronger, preventing vaporization.
The volume of the mixture is greater than the sum of individual volumes.
The intermolecular forces between unlike molecules are weaker, leading to easier vaporization.
The intermolecular forces between like molecules are weaker than between unlike molecules.
Which of the following mixtures forms a maximum boiling azeotrope?
Acetone and Chloroform
Ethanol and Water
Carbon tetrachloride and Chloroform
n-Hexane and n-Heptane
A mixture of liquid X and liquid Y forms a maximum boiling azeotrope. What can be inferred about the intermolecular forces between X and Y compared to the forces within pure X and pure Y?
The forces between X and Y are stronger.
The forces between X and Y are weaker.
The forces between X and Y are equal to the forces within pure X and pure Y.
The forces between X and Y are negligible.
Which of the following pairs of liquids is LEAST likely to form a maximum boiling azeotrope?
Water and Hydrochloric acid
Acetone and Chloroform
Nitric acid and Water
n-Hexane and n-Heptane
For a mixture of two liquids to behave ideally, the interactions between unlike molecules should be:
Stronger than the interactions between like molecules
Weaker than the interactions between like molecules
Equal to the interactions between like molecules
Negligible compared to the interactions between like molecules
