Which of the following components on mixing will form a non-ideal solution :C6H6 and C6H5CH3C2H5Cl and C6H5OHC6H5Cl and C6H5BrC2H5Br and C2H5I

The formation of a non-ideal solution depends on the nature of the components being mixed. Non-ideal solutions are formed when the interactions between the different molecules are not the same as the interactions between the same type of molecules.

1. C6H6 (Benzene) and C6H5CH3 (Toluene): These two components are very similar in nature. They are both aromatic hydrocarbons and have similar types of intermolecular forces. Therefore, they are likely to form an ideal solution when mixed.

2. C2H5Cl (Ethyl Chloride) and C6H5OH (Phenol): Ethyl Chloride is a polar molecule while Phenol is a polar molecule with a hydroxyl group (-OH) which can form hydrogen bonds. The difference in the types of intermolecular forces could lead to the formation of a non-ideal solution.

3. C6H5Cl (Chlorobenzene) and C6H5Br (Bromobenzene): These two components are very similar in nature. They are both halogenated aromatic hydrocarbons and have similar types of intermolecular forces. Therefore, they are likely to form an ideal solution when mixed.

4. C2H5Br (Ethyl Bromide) and C2H5I (Ethyl Iodide): These two components are very similar in nature. They are both halogenated alkanes and have similar types of intermolecular forces. Therefore, they are likely to form an ideal solution when mixed.

So, based on the above analysis, C2H5Cl (Ethyl Chloride) and C6H5OH (Phenol) are most likely to form a non-ideal solution when mixed.