Identify the false statement among the following.

- (1) Ideal solution obey Raoult's law over the entire range of temperature and concentration: This is true. An ideal solution is one in which the intermolecular interactions between the components are identical to those between the molecules of the individual components. As a result, an ideal solution obeys Raoult's law over the entire range of concentrations and temperatures.
- (2) For ideal solution, \(\Delta \mathrm{V}=0\) : This is true. In an ideal solution, the volume change upon mixing \((\Delta \mathrm{V})\) is zero, meaning the total volume of the solution is the sum of the volumes of the individual components, with no contraction or expansion during mixing.
- (3) Non-ideal solutions do not obey Raoult's law over the entire range of concentration: This is true. Non-ideal solutions exhibit deviations from Raoult's law due to differences in intermolecular forces between the components. These deviations may occur over certain concentration ranges or at specific temperatures.
- (4) Vapour pressure of non-ideal solution always lies between the vapour pressures of pure components: This statement is false. In non-ideal solutions, the vapour pressure can be higher or lower than the vapour pressures of the pure components, depending on whether, the solution experiences positive or negative