Solutions

A solution containing components A and B follows Raoult's law when

1. A-B attraction force is greater than A-A and B-B
2. A-B attraction force is less than A-A and B-B
3. A-B attraction force remains same as A-A and B-B
4. volume of solution is different from sum of volumes of solute and solvent

Answer

(3) A-B attraction force remains same as A-A and B-B

Solution

A solution that obeys Raoult's law over the entire range of concentration is an ideal solution.

As per NCERT, in an ideal solution the solute–solute (A-A) and solvent–solvent (B-B) interactions are nearly equal to the solute–solvent (A-B) interactions.

Also mixH = 0 and mixV = 0, so the volume of the solution equals the sum of the volumes of the components.

Answer: (3)