The ratio of any colligative property for KCl the solution to that of sugar solution of same molality is

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

Colligative property depends on the particles

$\mathrm{KCl}\to {\mathrm{K}}^{+}+{\mathrm{Cl}}^{-}$

KCl dissociates into 2 different ions (Na+, Cl−) but sugar has only one whole molecule.

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

Therefore, Option C is the correct answer