ANS:A - increases rapidly with temperature rise.

the statement "increases rapidly with temperature rise" doesn't accurately describe the behavior of boiling point elevation in ideal solutions. Boiling point elevation is a colligative property, meaning it depends solely on the concentration of solute particles in the solvent, regardless of the nature of the solute. As the temperature rises, the boiling point elevation remains proportional to the molality (concentration) of the solute particles in the solution. However, the rate of increase in boiling point elevation with temperature rise is not necessarily rapid. It follows a linear relationship according to the equation: ΔTb​=i⋅Kb​⋅m Where:

• ΔTb​ is the boiling point elevation,
• i is the van't Hoff factor (the number of particles the solute dissociates into in solution),
• Kb​ is the ebullioscopic constant (a constant characteristic of the solvent),
• m is the molality of the solution.

This equation indicates that the boiling point elevation increases linearly with the molality of the solute, not necessarily rapidly, as temperature rises. The rate of increase depends on the specific solvent and solute involved. Therefore, it's not accurate to say that boiling point elevation increases rapidly with temperature rise in ideal solutions.