NEET 2025 — Chemistry solution

NEET2025Chemistry

Which of the following aqueous solution will exhibit highest boiling point?

Solution

Elevation in boiling point: $Δ T_{b} = i K_{b} m$ . With $K_{b}$ the same for water and $m \approx M$ , what matters is $i \times M$ .

(1) Urea (non-electrolyte, $i = 1$ ): $1 \times 0.01 = 0.01$ .

(2) KNO $_{3}$ ( $i = 2$ ): $2 \times 0.01 = 0.02$ .

(3) Na $_{2}$ SO $_{4}$ ( $i = 3$ ): $3 \times 0.01 = 0.03$ .

(4) Glucose ( $i = 1$ ): $1 \times 0.015 = 0.015$ .

$∴$ Na $_{2}$ SO $_{4}$ has the highest $i M$ , so highest boiling point.

Practice more Chemistry

Concept-wise practice with instant solutions on Fundamenthol.