Q1: Roult's law is obeyed by a __________ solution.

ANS:D - none of these

Raoult's law is obeyed by an ideal solution. Raoult's law states that the vapor pressure of a component in an ideal solution is directly proportional to its mole fraction in the solution and the vapor pressure of the pure component. Mathematically, it can be expressed as: 𝑃𝑖=𝑃𝑖pure×𝑋𝑖Pi​=Pipure​×Xi​ Where:

• 𝑃𝑖Pi​ is the vapor pressure of component 𝑖i in the solution.
• 𝑃𝑖purePipure​ is the vapor pressure of pure component 𝑖i.
• 𝑋𝑖Xi​ is the mole fraction of component 𝑖i in the solution.

An ideal solution is a solution where the interactions between solute-solute, solvent-solvent, and solute-solvent molecules are the same. In practice, ideal solutions are rare, but dilute solutions or solutions where the solute-solvent interactions are similar to solute-solute and solvent-solvent interactions can approximate ideal behavior. Therefore, the correct answer is none of these options provided; Raoult's law is obeyed by an ideal solution.