On the basis of information given below mark the correct option.
I. In bromo ethane and chloro ethane mixture,inter molecular interactions of A - A and B - B type are nearly same as A-B type interactions.
II. In ethanol and acetone mixture A-A or B-B type inter molecular interactions are stronger than A-B type interactions.
III. In chloroform and acetone mixture A-A or B-B type inter molecular interactions are weaker than A-B type interactions.

detailed solution

Correct option is B

For an ideal solution, the A-A or B-B type inter molecular interaction are equal to A-B type interactions. Here, a mixture of bromoethane and chloroethane is an example of ideal solution. So it follows Raoult's law.On the other hand, chloroform and acetone mixture is an example of non-ideal solution having negative deviation. So, A- A are B- B type interactions must be stronger than A-B type interaction. while ethanol-acetone mixture shows positive deviation due to weak er A-B interactions in comparison to A-A are B-B interactions.