Question

A solution is formed by mixing chloroform (CHCl3) and acetone (CH3COCH3).
Which of the following is true regarding the nature of this solution?

• A. It shows positive deviation from Raoult's law due to weak intermolecular forces.
• B. It shows negative deviation due to strong dipole-dipole interactions.
• C. It obeys Raoult's law over the entire range of composition.
• D. It forms an ideal solution with no enthalpy change.

Hint:

When dealing with solutions, remember that positive deviation occurs when the forces between different molecules are weaker than those between the same molecules. In contrast, negative deviation occurs when the forces are stronger.

Answer 1

The Correct Option is A

Mixing chloroform (CHCl3) and acetone (CH3COCH3) yields a solution that shows a positive deviation from Raoult's law. This deviation occurs because the intermolecular forces between chloroform and acetone molecules are weaker than the forces between like molecules. Consequently, the solution's vapor pressure exceeds the predicted value, confirming a positive deviation from Raoult's law.