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Which of the following solutions is an example of an ideal solution?

Option: 1

Bromobenzene and Chlorobenzene


Option: 2

Benzene and Acetone
 


Option: 3

Acetone and Carbon disulphide

 


Option: 4

Nitric acid and water


Answers (1)

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An ideal solution is a solution that obeys Raoult's law at all concentrations and temperatures. Raoult's law states that the vapor pressure of a solution is equal to the mole fraction of the solvent multiplied by its vapor pressure in the pure state. In other words, the partial pressure of each component in a solution is proportional to its mole fraction in the solution.

Bromobenzene and chlorobenzene have similar chemical structures and intermolecular forces, which results in a nearly ideal mixing behavior of the two components in the liquid phase. This leads to the solution obeying Raoult's law at all concentrations and temperatures. Benzene and acetone do not form an ideal solution due to differences in polarity between the two components. Acetone and carbon disulphide also do not form an ideal solution due to differences in intermolecular forces between the two components. Nitric acid and water form a non-ideal solution due to ion-dipole interactions between the solute and solvent molecules.

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