An ideal solution is a solution in which the interactions between the solute and solvent are identical. In other words, the solute-solute, solvent-solvent, and solute-solvent interactions are all similar.


Acetone and carbon disulphide do not form an ideal solution because their interactions are not identical. Acetone is a polar molecule, while carbon disulphide is nonpolar. Therefore, the interactions between acetone molecules will be different from the interactions between carbon disulphide molecules.


Acetone and chloroform also do not form an ideal solution because their interactions are not identical. Acetone is a polar molecule, while chloroform is nonpolar. The different polarities of these molecules result in different solute-solvent interactions.


Ethanol and water do form an ideal solution because their interactions are identical. Both ethanol and water are polar molecules and have similar polarities. The interactions between ethanol and water molecules are similar to the interactions between water molecules, making ethanol and water an ideal solution.


Bromobenzene and chlorobenzene also form an ideal solution because their interactions are identical. Both bromobenzene and chlorobenzene are nonpolar molecules and have similar nonpolarities. The interactions between bromobenzene and chlorobenzene molecules are similar to the interactions between chlorobenzene molecules, making them an ideal solution.

Therefore, the correct answer is option 'D' – Bromobenzene and Chlorobenzene form an ideal solution.