Aqueous solutions from the following with the highest boiling point w…

The correct answer is Option (4) → 1.0 M Fructose

Elevation of boiling point is a colligative property: it depends on the number of solute particles, not on their nature. For a dilute solution

    \( \Delta T_b = i\,K_b\,m \)

The question says there is no dissociation or association, so i = 1 for every solute, and K_b is the same (all are aqueous). The boiling point is then highest for the highest concentration of solute (for dilute aqueous solutions molarity and molality are nearly equal):

    1.0 M fructose > 0.25 M glucose > 0.2 M acetic acid > 0.1 M urea

So 1.0 M fructose boils at the highest temperature.

NCERT (2026-27 edition):
Elevation of Boiling Point – “… Similar to lowering of vapour pressure, the elevation of boiling point also depends on the number of solute molecules rather than their nature.”

Elevation of Boiling Point – “… Experiments have shown that for dilute solutions the elevation of boiling point (ΔT_b) is directly proportional to the molal concentration of the solute in a solution. Thus
ΔT_b ∝ m    (1.29)
or ΔT_b = K_b m    (1.30)”