Question

The ratio of the value of any colligative property for $KCl$ solution to that for sugar solution of same molality is nearly ________ time.

• A. $1$
• B. $0.5$
• C. $2$
• D. $2.5$

Answer 1

Answer: (C)

$2$

An ionic compound will dissociate and covalent compounds will not dissociate.

$KCl\to K^{+}+C{l}^{-}$

Colligative property depends on no of particles

$KCl$ dissociates into 2 ions ($N{a}^{+},C{l}^{-}$) but sugar has only one whole molecule.

So the ratio of the value of any colligative property for $KCl$ solution to that for sugar solution of the same molality is nearly $2$ times.

Hence option C is correct.