Question

Which of the following $0.1M$ aqueous solution will have the lowest freezing point?

• A. Potassium sulphate
• B. Sodium chloride
• C. Urea
• D. Glucose

Answer 1

Answer: (A)

$K_{2}S{O}_4:i=3$
$NaCI:i=2$
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, K${}_{2}S{O}_4$ solution has the lowest freezing point