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

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Q. Which of the following $0.1 \,M$ aqueous solution will have the lowest freezing point?

IIT JEEIIT JEE 1989Solutions

Solution:

$K_2SO_4 : i=3$
$NaCI : i=2$
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$_2SO_4$ solution has the lowest freezing point