Question

A solution containing components A and B follows Raoult's law : -

• A. A - B attraction force is greater than A - A and B - B
• B. A - B attraction force is less than A - A and B - B
• C. Attraction force remains same in A - A and B - B
• D. Volume of solution is different from sum of volume of solute and solvent

Answer 1

The Correct Option is C

To solve this question, we need to understand Raoult's law and how it applies to solutions:

Understanding Raoult's Law:

Raoult's law states that the vapor pressure of an ideal solution is dependent on the vapor pressure of each chemical component and the mole fraction of the component present in the solution. For a solution to obey Raoult's law, it must behave ideally.

In an ideal solution, the interactions between the different molecules (A and B) are the same as they are between molecules of the same type (A-A or B-B). This means:

• A-A interactions are similar to B-B interactions and similar to A-B interactions.

Given this understanding, let's evaluate the provided options:

1. A - B attraction force is greater than A - A and B - B: This statement indicates that the solution exhibits negative deviations from Raoult's law, which isn't the case here.
2. A - B attraction force is less than A - A and B - B: This would mean positive deviation from Raoult's law, thus not applicable here.
3. Attraction force remains same in A - A and B - B: This is the correct choice. For an ideal solution conforming to Raoult's law, the interaction forces should be essentially identical or nearly identical.
4. Volume of solution is different from sum of volume of solute and solvent: This refers to volumetric changes, which do not necessarily pertain to Raoult's law.

Thus, the correct answer is:

Attraction force remains same in A - A and B - B.