Solutions and Colligative Properties 2 Question 24
24. Which of the following $0.1 \mathrm{M}$ aqueous solution will have the lowest freezing point?
(1989, 1M)
(a) Potassium sulphate
(b) Sodium chloride
(c) Urea
(d) Glucose
Show Answer
Solution:
- $\mathrm{K}{2} \mathrm{SO}{4}: \quad i=3$
$\mathrm{NaCl}: \quad i=2$
Urea : $i=1$
Glucose : $i=1$
Greater the value of $i$, greater the lowering in freezing point, lower will be the freezing temperature, if molarity in all cases are same. Therefore, $\mathrm{K}{2} \mathrm{SO}{4}$ solution has the lowest freezing point.
