Colligative Property

Correct Answer: E. The lower density of ice than the solution from which it forms.

The lowering of vapor pressure, elevation of the boiling point, depression of freezing point and increase in osmotic pressure with increasing solute concentration are all colligative properties of the solution, as they all depend on the concentration of solution only and not the type of solute.

The lower density of ice than the solution it forms from is due to hydrogen bonding between the water molecules in the solid ice holding the water molecules further apart than they are in the liquid state. This is true for all water solutions and pure water and does not depend on concentration.

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